{"id":3149,"date":"2025-10-29T14:33:06","date_gmt":"2025-10-29T05:33:06","guid":{"rendered":"https:\/\/xb317241.xbiz.jp\/?page_id=3149"},"modified":"2025-12-16T13:47:18","modified_gmt":"2025-12-16T04:47:18","slug":"quality","status":"publish","type":"page","link":"https:\/\/www.takeuchi-const.co.jp\/en\/synergy\/quality\/","title":{"rendered":"Quality Control of the TNF Construction Method"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Quality control is carried out in accordance with our \u201cTNF Construction Method Construction Management Standards.\u201d<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Laboratory Mix Design Test<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Before construction, laboratory mix design tests are conducted using soil samples collected from trial excavation at the site to determine the appropriate amount of stabilizing agent to be added.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"639\" height=\"419\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph01.jpg\" alt=\"\" class=\"wp-image-3350\" srcset=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph01.jpg 639w, https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph01-300x197.jpg 300w\" sizes=\"auto, (max-width: 639px) 100vw, 639px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Hexavalent Chromium Leaching Test<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">After the mix design test, we confirm that the amount of hexavalent chromium leached from the improved soil\u2014produced using on-site soil and the planned stabilizing agent\u2014falls within the soil environmental standard limits.<br><br><em>This test is conducted in accordance with the leaching test specified in Environmental Agency Notification No. 46 (Test Method 1), performed at the mix design stage.<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"639\" height=\"419\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph02.jpg\" alt=\"\" class=\"wp-image-3351\" srcset=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph02.jpg 639w, https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph02-300x197.jpg 300w\" sizes=\"auto, (max-width: 639px) 100vw, 639px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. On-Site Unconfined Compressive Strength Test<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">During ground improvement construction, unconfined compressive strength tests (JIS A 1216) are conducted after 7 and 28 days to verify that the strength meets or exceeds the design criteria.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"639\" height=\"419\" src=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph03.jpg\" alt=\"\" class=\"wp-image-3353\" srcset=\"https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph03.jpg 639w, https:\/\/www.takeuchi-const.co.jp\/en\/wp-content\/uploads\/2025\/10\/l_ph03-300x197.jpg 300w\" sizes=\"auto, (max-width: 639px) 100vw, 639px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Quality control is carried out in accordance with our \u201cTNF Construction Method Construction Management Standards.\u201d 1. Laboratory Mix Design Test Before construction, laboratory mix design tests are conducted using soil samples collected from trial excavation at the site to determine the appropriate amount of stabilizing agent to be added. 2. Hexavalent Chromium Leaching Test After [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4432,"parent":27,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3149","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/3149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/comments?post=3149"}],"version-history":[{"count":1,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/3149\/revisions"}],"predecessor-version":[{"id":4571,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/3149\/revisions\/4571"}],"up":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/pages\/27"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/media\/4432"}],"wp:attachment":[{"href":"https:\/\/www.takeuchi-const.co.jp\/en\/wp-json\/wp\/v2\/media?parent=3149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}