{"id":5869,"date":"2018-02-07T08:00:05","date_gmt":"2018-02-06T23:00:05","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=5869"},"modified":"2026-05-15T20:26:29","modified_gmt":"2026-05-15T11:26:29","slug":"wash-water-ph-treatment-manual","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/wash-water-ph-treatment-manual\/","title":{"rendered":"pH Adjustment of Wash Water (Manual) | D51 Case Study on Seismic Retrofit of Bridges"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

We\u2019ve been receiving a lot of inquiries about clip spacers lately.<\/p>\n

The reason is that, while there are many design consulting firms, it appears to involve rebar insertion work for seismic retrofitting of bridges.<\/p>\n

I'm hoping a lot of them will end up leaving because of the seismic retrofitting work! lol<\/p>\n

\"Bridge<\/p>\n

By the way, the rock bolts used in this bridge seismic retrofitting project were D51 lol<\/p>\n

One of the biggest rock bolts in the country lol<\/p>\n

Even if you just think about it normally, isn't the D51 a bit unrealistic??<\/p>\n

Wouldn't it have been better to reduce the diameter of the PC tension rod in the Gebindistab?<\/p>\n

I keep telling myself that, but I actually felt kind of happy working on my first D51 project lol<\/p>\n

The employee was... angry.\"Super<\/p>\n

\n

But that's beside the point.<\/p>\n

 <\/p>\n

\"Litmus<\/p>\n

Have you heard of this?<\/p>\n

That's right!<\/p>\n

That's what they call litmus paper, isn't it?<\/p>\n

Don't you use it every now and then?<\/p>\n

I bought one myself for the first time in a while, and it seems you can now check the pH range down to the finest details.<\/p>\n

By the way, it's Tokyu Hands.<\/p>\n

I seem to remember that there used to be only one kind.<\/p>\n

So, what do you do with this?pH Adjustment of Wash Water<\/span><\/strong><\/span>That's right.<\/p>\n

Usually, we have the ready-mix concrete company take the wash water back with them, but that wasn't possible this time, so<\/p>\n

We treat the wash water that has seeped out of the flexible containers.\"Drain<\/p>\n

It's a little hard to see, but there's a box with a flexible container bag on top of it on the right side of the photo above.<\/p>\n

Hang the flexible container bag from a single pipe, and fill it with wash water, leftover cement slurry, and wash water from the spray application.<\/p>\n

Any material remaining in the flexible container bags will be disposed of as industrial waste.<\/p>\n

Adjust the pH of the water that has accumulated below the lower mesh.<\/p>\n

First, add the coagulant.<\/p>\n

\"Poly<\/p>\n

The photo above shows polyaluminum chloride (PAC) used in water treatment. Products such as sulfuric acid-based coagulants are of the same type.<\/p>\n

What Is a Flocculant?<\/a><\/span><\/span><\/strong><\/span><\/p>\n

Add this in small amounts while stirring.<\/p>\n

\"Makita<\/p>\n

If you don't stir thoroughly while doing this, the pH will fluctuate.<\/p>\n

I'll keep dipping in a bit of litmus paper here and there to check.<\/p>\n

\"Litmus<\/p>\n

The color of the litmus paper changes gradually, like this.<\/p>\n

Anyway, the trick is to add it little by little.<\/p>\n

If you add all of this at once, it'll suddenly become acidic, which will cause some trouble lol<\/p>\n

The key is to take it little by little<\/span><\/strong><\/span>That's it.<\/p>\n

 <\/p>\n

The discharge standards for contaminated water from construction projects are as follows.<\/p>\n\n\n\n\n\n\n\n\n
Category<\/td>\nEnabling Act<\/td>\nSS Reference Values<\/td>\npH Reference Values<\/td>\n<\/tr>\n
Discharge Standards<\/td>\nWater Pollution Control Act<\/td>\n200 mg\/L
\n(Daily average of 150 mg\/L)<\/td>\n		5.8\u20138.6<\/strong><\/span><\/td>\n<\/tr>\n
Additional Drainage Standards<\/td>\nPrefectural Ordinances<\/td>\nSet by Prefecture<\/td>\nSet by Prefecture<\/strong><\/span><\/td>\n<\/tr>\n
River Environmental Standards<\/td>\nBasic Environment Act<\/td>\n25 mg\/L or less<\/td>\n6.5\u20138.5<\/strong><\/span><\/td>\n<\/tr>\n
Drinking Water Quality Standards<\/td>\nWaterworks Act<\/td>\nTurbidity of 2 or less<\/td>\n5.8\u20138.6<\/strong><\/span><\/td>\n<\/tr>\n
Water Quality Standards for Aquaculture
\n(Rivers)<\/td>\n		None<\/td>\n25 mg\/L or less
\nThe concentration of artificially added suspended solids must not exceed 5 mg\/L.
\n(When artificially introduced turbidity persists over a long period)<\/td>\n		6.7\u20137.5<\/strong><\/span>
\n There are no sudden changes in pH severe enough to adversely affect the organisms living there.<\/strong><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Generally speaking, it\u2019s okay to release it if the pH is between 6 and 8, but let\u2019s aim for a neutral pH as close to 7 as possible!<\/p>\n

It's just a small thing, but once you get used to it, it's easy.<\/p>\n

If there's a place on-site where you can set up a pH treatment unit, using carbon dioxide would be a breeze, but it does cost money, doesn't it? lol<\/p>\n

It's just a little tip, but it comes in handy if you know it.<\/p>\n

 <\/p>\n

See you later.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. Lately, I\u2019ve been getting a lot of inquiries about clip spacers. It seems that many of these are from design consulting firms, and they\u2019re likely being used for rebar insertion work in bridge seismic retrofitting projects. I\u2019m hoping we\u2019ll see a lot of these used in seismic retrofitting projects soon! lol. Well\u2026<\/p>","protected":false},"author":2,"featured_media":5895,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[111],"tags":[1157,1158,1159,1160,1161,1162,1163],"class_list":["post-5869","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-safety","tag-ph","tag-1160","tag-1161","tag-1162","tag-1163"],"acf":[],"yoast_head":"\n\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b - \u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e<\/title>\n<meta name=\"description\" content=\"\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u5de5\u4e8b\u3067\u30af\u30ea\u30c3\u30d7\u30b9\u30da\u30fc\u30b5\u30fc\u554f\u3044\u5408\u308f\u305b\u304c\u5897\u52a0\u3002\u56fd\u5185\u6700\u5927\u7d1aD51\u30ed\u30c3\u30af\u30dc\u30eb\u30c8\u306e\u4e8b\u4f8b\u3068\u3001\u6d17\u3044\u6c34\u306epH\u51e6\u7406\u3092\u624b\u52d5\u3067\u884c\u3046\u65b9\u6cd5\u3092\u89e3\u8aac\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/norimen.net\/en\/wash-water-ph-treatment-manual\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b\" \/>\n<meta property=\"og:description\" content=\"\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u5de5\u4e8b\u3067\u30af\u30ea\u30c3\u30d7\u30b9\u30da\u30fc\u30b5\u30fc\u554f\u3044\u5408\u308f\u305b\u304c\u5897\u52a0\u3002\u56fd\u5185\u6700\u5927\u7d1aD51\u30ed\u30c3\u30af\u30dc\u30eb\u30c8\u306e\u4e8b\u4f8b\u3068\u3001\u6d17\u3044\u6c34\u306epH\u51e6\u7406\u3092\u624b\u52d5\u3067\u884c\u3046\u65b9\u6cd5\u3092\u89e3\u8aac\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/norimen.net\/en\/wash-water-ph-treatment-manual\/\" \/>\n<meta property=\"og:site_name\" content=\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/norimenman\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/norimenman\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-02-06T23:00:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-15T11:26:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/02\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"460\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u30a8\u30f3\u30bf\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@norimenman\" \/>\n<meta name=\"twitter:site\" content=\"@norimenman\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u30a8\u30f3\u30bf\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/\"},\"author\":{\"name\":\"\u30a8\u30f3\u30bf\",\"@id\":\"https:\\\/\\\/norimen.net\\\/#\\\/schema\\\/person\\\/7e507d48b040ed0f7a88ef4625070b95\"},\"headline\":\"\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b\",\"datePublished\":\"2018-02-06T23:00:05+00:00\",\"dateModified\":\"2026-05-15T11:26:29+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/\"},\"wordCount\":29,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2018\\\/02\\\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg\",\"keywords\":[\"pH\u51e6\u7406\",\"\u624b\u52d5pH\u51e6\u7406\",\"pH\u51e6\u7406\u5668\",\"\u70ad\u9178\u30ac\u30b9\",\"\u51dd\u96c6\u5264\",\"\u30ea\u30c8\u30de\u30b9\u8a66\u9a13\u7d19\",\"\u74b0\u5883\u4fdd\u8b77\"],\"articleSection\":[\"\u5b89\u5168\u7ba1\u7406\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/\",\"url\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/\",\"name\":\"\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b - \u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2018\\\/02\\\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg\",\"datePublished\":\"2018-02-06T23:00:05+00:00\",\"dateModified\":\"2026-05-15T11:26:29+00:00\",\"description\":\"\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u5de5\u4e8b\u3067\u30af\u30ea\u30c3\u30d7\u30b9\u30da\u30fc\u30b5\u30fc\u554f\u3044\u5408\u308f\u305b\u304c\u5897\u52a0\u3002\u56fd\u5185\u6700\u5927\u7d1aD51\u30ed\u30c3\u30af\u30dc\u30eb\u30c8\u306e\u4e8b\u4f8b\u3068\u3001\u6d17\u3044\u6c34\u306epH\u51e6\u7406\u3092\u624b\u52d5\u3067\u884c\u3046\u65b9\u6cd5\u3092\u89e3\u8aac\u3002\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#primaryimage\",\"url\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2018\\\/02\\\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg\",\"contentUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2018\\\/02\\\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg\",\"width\":600,\"height\":460,\"caption\":\"\u74b0\u5883\u4fdd\u8b77\u3059\u308b\u306e\u308a\u9762\u5c4b\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u30db\u30fc\u30e0\",\"item\":\"https:\\\/\\\/norimen.net\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/norimen.net\\\/#website\",\"url\":\"https:\\\/\\\/norimen.net\\\/\",\"name\":\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\",\"description\":\"\u6cd5\u9762\u306e\u4e8b\u3092\u672c\u6c17\u3067\u77e5\u308a\u305f\u3044\u3042\u306a\u305f\u3078\uff01\",\"publisher\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/#organization\"},\"alternateName\":\"\u30a8\u30f3\u30bf\u306e\u30ce\u30ea\u30e1\u30f3\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/norimen.net\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Organization\",\"Place\"],\"@id\":\"https:\\\/\\\/norimen.net\\\/#organization\",\"name\":\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\",\"alternateName\":\"\u5869\u7530\u958b\u767a\u682a\u5f0f\u4f1a\u793e\",\"url\":\"https:\\\/\\\/norimen.net\\\/\",\"logo\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#local-main-organization-logo\"},\"image\":{\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#local-main-organization-logo\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/norimenman\",\"https:\\\/\\\/x.com\\\/norimenman\",\"https:\\\/\\\/www.instagram.com\\\/enta.d\"],\"telephone\":[],\"openingHoursSpecification\":[{\"@type\":\"OpeningHoursSpecification\",\"dayOfWeek\":[\"Monday\",\"Tuesday\",\"Wednesday\",\"Thursday\",\"Friday\",\"Saturday\",\"Sunday\"],\"opens\":\"09:00\",\"closes\":\"17:00\"}]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/norimen.net\\\/#\\\/schema\\\/person\\\/7e507d48b040ed0f7a88ef4625070b95\",\"name\":\"\u30a8\u30f3\u30bf\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g\",\"caption\":\"\u30a8\u30f3\u30bf\"},\"description\":\"\u5927\u624b\u6cd5\u9762\u5c02\u9580\u5efa\u8a2d\u4f1a\u793e\u306b\u5c31\u8077\u5f8c\u300132\u6b73\u3067\u72ec\u7acb\u3002 \u3042\u307e\u308a\u306e\u6687\u3055\u306b\u30d6\u30ed\u30b0\u3092\u958b\u8a2d\u3002\u6cd5\u9762\u306e\u30ce\u30a6\u30cf\u30a6\u3092\u516c\u958b\u3057\u3001\u3042\u308a\u3068\u3042\u3089\u3086\u308b\u8cea\u554f\u306b\u7b54\u3048\u3066\u304d\u307e\u3057\u305f\u3002 \u305d\u306e\u7d50\u679c\u3001\u6cd5\u9762\u696d\u8005\u3001\u5143\u8acb\u696d\u8005\u3001\u305d\u306e\u4ed6\u30bc\u30cd\u30b3\u30f3\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u3001\u8cea\u554f\u3001\u53d7\u6ce8\u304c\u5897\u3048\u3066\u304d\u307e\u3057\u305f\u3002 \u30a2\u30e1\u30d6\u30ed\u3067\u306f\u30bd\u30b3\u30bd\u30b3\u95b2\u89a7\u304c\u5897\u3048\u3001 \u305d\u3053\u3067\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u53d6\u5f97\u3057\u5c11\u3057\u3067\u3082\u5feb\u9069\u306a\u30d6\u30ed\u30b0\u3092\u76ee\u5dee\u3059\u3079\u304f\u3001\u30a2\u30e1\u30d6\u30ed\u304b\u3089\u306e\u5352\u696d\u3092\u6c7a\u3081\u307e\u3057\u305f\u3002 \u4eca\u5f8c\u3082\u3053\u3061\u3089\u3067\u5305\u307f\u96a0\u3055\u305a\u5168\u3066\u306e\u30ce\u30a6\u30cf\u30a6\u3092\u516c\u958b\u3057\u3066\u3044\u3053\u3046\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002 \u4eca\u5f8c\u3068\u3082\u3088\u308d\u3057\u304f\u304a\u9858\u3044\u7533\u3057\u4e0a\u3052\u307e\u3059\u3002\",\"sameAs\":[\"http:\\\/\\\/enta-d.co.jp\\\/\",\"https:\\\/\\\/www.facebook.com\\\/norimenman\\\/\",\"https:\\\/\\\/www.instagram.com\\\/enta.d\\\/\",\"https:\\\/\\\/x.com\\\/norimenman\",\"https:\\\/\\\/www.youtube.com\\\/c\\\/entadnorimenman\"]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/norimen.net\\\/wash-water-ph-treatment-manual\\\/#local-main-organization-logo\",\"url\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/site_title_logo.png\",\"contentUrl\":\"https:\\\/\\\/norimen.net\\\/wordpress\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/site_title_logo.png\",\"width\":220,\"height\":50,\"caption\":\"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"pH Adjustment of Wash Water (Manual) | D51 Case Study on Bridge Seismic Retrofit - Shin-Enta's Slope Management School","description":"Inquiries about clip spacers are on the rise due to bridge seismic retrofitting projects. This article explains a case study involving Japan\u2019s largest D51 rock bolts and a method for manually adjusting the pH of rinse water.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/norimen.net\/en\/wash-water-ph-treatment-manual\/","og_locale":"en_US","og_type":"article","og_title":"\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b","og_description":"\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u5de5\u4e8b\u3067\u30af\u30ea\u30c3\u30d7\u30b9\u30da\u30fc\u30b5\u30fc\u554f\u3044\u5408\u308f\u305b\u304c\u5897\u52a0\u3002\u56fd\u5185\u6700\u5927\u7d1aD51\u30ed\u30c3\u30af\u30dc\u30eb\u30c8\u306e\u4e8b\u4f8b\u3068\u3001\u6d17\u3044\u6c34\u306epH\u51e6\u7406\u3092\u624b\u52d5\u3067\u884c\u3046\u65b9\u6cd5\u3092\u89e3\u8aac\u3002","og_url":"https:\/\/norimen.net\/en\/wash-water-ph-treatment-manual\/","og_site_name":"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e","article_publisher":"https:\/\/www.facebook.com\/norimenman","article_author":"https:\/\/www.facebook.com\/norimenman\/","article_published_time":"2018-02-06T23:00:05+00:00","article_modified_time":"2026-05-15T11:26:29+00:00","og_image":[{"width":600,"height":460,"url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/02\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg","type":"image\/jpeg"}],"author":"\u30a8\u30f3\u30bf","twitter_card":"summary_large_image","twitter_creator":"@norimenman","twitter_site":"@norimenman","twitter_misc":{"Written by":"\u30a8\u30f3\u30bf"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#article","isPartOf":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/"},"author":{"name":"\u30a8\u30f3\u30bf","@id":"https:\/\/norimen.net\/#\/schema\/person\/7e507d48b040ed0f7a88ef4625070b95"},"headline":"\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b","datePublished":"2018-02-06T23:00:05+00:00","dateModified":"2026-05-15T11:26:29+00:00","mainEntityOfPage":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/"},"wordCount":29,"commentCount":0,"publisher":{"@id":"https:\/\/norimen.net\/#organization"},"image":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#primaryimage"},"thumbnailUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/02\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg","keywords":["pH\u51e6\u7406","\u624b\u52d5pH\u51e6\u7406","pH\u51e6\u7406\u5668","\u70ad\u9178\u30ac\u30b9","\u51dd\u96c6\u5264","\u30ea\u30c8\u30de\u30b9\u8a66\u9a13\u7d19","\u74b0\u5883\u4fdd\u8b77"],"articleSection":["\u5b89\u5168\u7ba1\u7406"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/","url":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/","name":"pH Adjustment of Wash Water (Manual) | D51 Case Study on Bridge Seismic Retrofit - Shin-Enta's Slope Management School","isPartOf":{"@id":"https:\/\/norimen.net\/#website"},"primaryImageOfPage":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#primaryimage"},"image":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#primaryimage"},"thumbnailUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/02\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg","datePublished":"2018-02-06T23:00:05+00:00","dateModified":"2026-05-15T11:26:29+00:00","description":"Inquiries about clip spacers are on the rise due to bridge seismic retrofitting projects. This article explains a case study involving Japan\u2019s largest D51 rock bolts and a method for manually adjusting the pH of rinse water.","breadcrumb":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/norimen.net\/wash-water-ph-treatment-manual\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#primaryimage","url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/02\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg","contentUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/02\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg","width":600,"height":460,"caption":"\u74b0\u5883\u4fdd\u8b77\u3059\u308b\u306e\u308a\u9762\u5c4b"},{"@type":"BreadcrumbList","@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u30db\u30fc\u30e0","item":"https:\/\/norimen.net\/"},{"@type":"ListItem","position":2,"name":"\u6d17\u3044\u6c34\u306epH\u51e6\u7406\uff08\u624b\u52d5\uff09\uff5c\u6a4b\u6881\u8010\u9707\u88dc\u5f37\u306eD51\u4e8b\u4f8b"}]},{"@type":"WebSite","@id":"https:\/\/norimen.net\/#website","url":"https:\/\/norimen.net\/","name":"Shin-Ent's Slope Management Seminar","description":"For those of you who are serious about learning about slopes!","publisher":{"@id":"https:\/\/norimen.net\/#organization"},"alternateName":"\u30a8\u30f3\u30bf\u306e\u30ce\u30ea\u30e1\u30f3","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/norimen.net\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Organization","Place"],"@id":"https:\/\/norimen.net\/#organization","name":"Shin-Ent's Slope Management Seminar","alternateName":"\u5869\u7530\u958b\u767a\u682a\u5f0f\u4f1a\u793e","url":"https:\/\/norimen.net\/","logo":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#local-main-organization-logo"},"image":{"@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#local-main-organization-logo"},"sameAs":["https:\/\/www.facebook.com\/norimenman","https:\/\/x.com\/norimenman","https:\/\/www.instagram.com\/enta.d"],"telephone":[],"openingHoursSpecification":[{"@type":"OpeningHoursSpecification","dayOfWeek":["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"],"opens":"09:00","closes":"17:00"}]},{"@type":"Person","@id":"https:\/\/norimen.net\/#\/schema\/person\/7e507d48b040ed0f7a88ef4625070b95","name":"Entertainment","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/7b9657262458e754e6e51a10396868dafe6afa60d649dffcd4d52a5fc01aaa7d?s=96&d=monsterid&r=g","caption":"\u30a8\u30f3\u30bf"},"description":"After joining a major construction company specializing in slope stabilization, I went independent at the age of 32. With so much free time on my hands, I started a blog. I\u2019ve been sharing my expertise on slope stabilization and answering all kinds of questions. As a result, I\u2019ve seen an increase in inquiries, questions, and orders from slope stabilization contractors, general contractors, and other major construction firms. My traffic on Ameblo grew to a reasonable level, so I decided to move on from Ameblo by acquiring my own domain in order to create a more user-friendly blog. I plan to continue sharing all my expertise openly and honestly here. I look forward to your continued support.","sameAs":["http:\/\/enta-d.co.jp\/","https:\/\/www.facebook.com\/norimenman\/","https:\/\/www.instagram.com\/enta.d\/","https:\/\/x.com\/norimenman","https:\/\/www.youtube.com\/c\/entadnorimenman"]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/norimen.net\/wash-water-ph-treatment-manual\/#local-main-organization-logo","url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/10\/site_title_logo.png","contentUrl":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2016\/10\/site_title_logo.png","width":220,"height":50,"caption":"\u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e"}]}},"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"publishpress_future_action":{"enabled":false,"date":"2026-08-21 13:55:26","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"jetpack_featured_media_url":"https:\/\/norimen.net\/wordpress\/wp-content\/uploads\/2018\/02\/2bbb04ffdc9a5b3a280b5f49390e13df.jpg","_links":{"self":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts\/5869","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/comments?post=5869"}],"version-history":[{"count":1,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts\/5869\/revisions"}],"predecessor-version":[{"id":60852,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/posts\/5869\/revisions\/60852"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/media\/5895"}],"wp:attachment":[{"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/media?parent=5869"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/categories?post=5869"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/norimen.net\/en\/wp-json\/wp\/v2\/tags?post=5869"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}