{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390303620066478336.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.69252/taiheiyoresearch.2004.146_11"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"7049171"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/7049171"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I7049171"}},{"identifier":{"@type":"NAID","@value":"40006367859"}}],"dc:title":[{"@language":"ja","@value":"β-ナフタレンスルホン酸系高性能減水剤の分散性能に影響するセメントキャラクターとその作用メカニズム"},{"@language":"en","@value":"Cement Characteristics Affecting the Dispersing Performance of Poly β-naphthalene Sulfonate Condensate Superplasticizer and these Affecting Mechanisms"},{"@language":"ja-Kana","@value":"Cement Characteristics Affecting the Dispersing Performance of Poly ベータ naphthalene Sulfonate Condensate Superplasticizer and these Affecting Mechanisms"}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"The dispersing performance of poly β-naphthalene sulfonate condensate superplasticizer (PNS) is known to be affected by various cement characteristics, e.g. the kinds of calcium sulfate, the amounts of alkali sulfate, the amounts of free lime and the phase composition of cement clinker especially the amount of C<sub>3</sub>A. Some studies have indicated the possibility that the mechanism of these phenomena can be explained by a simple theory, the particle dispersing performance of PNS is related to the adsorbed amount of PNS per unit surface area of cement hydrates (Ad/Hy).<br>　In this study, Ad/Hy is estimated from the amount of early hydrates and SO<sub>4</sub><sup>2-</sup> concentration by using a theoretical equation of Langmuir-type adsorption equilibrium. SO<sub>4</sub><sup>2-</sup> concentration influences Ad/Hy because SO<sub>4</sub><sup>2-</sup> is thought to be in Langmuir-type competitive adsorption equilibrium with PNS. By this method, adsorbed PNS on hydrates and absorbed PNS in hydrates can be separated. The relationship between the estimated Ad/Hy and the paste flow is investigated within 60min through some experiments. Considering the various effects of cement characteristics generally, six cement samples with different characteristics were selected. As individual affecting factors, the effects of alkali sulfate, free lime and calcium sulfate were examined.<br>　This Ad/Hy estimated from the amount of early hydrates and SO<sub>4</sub><sup>2-</sup> concentration shows a good correlation with the paste flow for all kinds of cement and for the changes with lapsed time. This indicates that the dispersing performance of PNS can be attributed in Ad/Hy mainly, and suggests that all cement characteristics affecting the SO<sub>4</sub><sup>2-</sup> concentration and the amount of early hydrates are the essential affecting factors for the dispersing performance of PNS."},{"@language":"ja","@value":"β-ナフタレンスルホン酸系高性能減水剤（PNS）の分散性能は，硫酸アルカリ量，フリーライム量，石膏の種類，C<sub>3</sub>A量などの多くのセメントキャラクターに影響されている．既往の研究により，これらの現象がある理論，PNS分散性能は水和物単位表面積当たりの吸着量（Ad/Hy）により決まる，ことで説明できる可能性が示唆されている．<br>　本研究では，Ad/HyをLangmuir型の吸着平衡に関する理論式を用いて初期水和物生成量とSO<sub>4</sub><sup>2-</sup>濃度より推定し，練り混ぜ直後～60分以内の範囲で，その推定値とペーストフローとの関係を解析した．なお，SO<sub>4</sub><sup>2-</sup>濃度はPNSとの競争的吸着により，Ad/Hyに影響すると考えた．この方法により，水和物上に吸着するPNSを水和物中に吸収されるPNSと区別して評価することができる．個々の影響因子として，硫酸アルカリ，フリーライム，および石膏の影響を調べると共に，セメントキャラクターの種々の影響を全体的に考察するためにキャラクターの異なるセメント6試料を用いた．<br>　SO<sub>4</sub><sup>2-</sup>濃度と初期水和物量より推定したAd/Hyは，全てのセメントに対して，経時変化も含めて，ペーストフローと良い相関を示した．また，石膏，硫酸アルカリ，フリーライムの影響も，Ad/Hyにより説明することができた．このことは，PNSの分散性能は主にAd/Hyに帰結できること，SO<sub>4</sub><sup>2-</sup>濃度と初期水和物量に影響する全てのセメントキャラクターがPNSの分散性能に対する影響因子であることを示唆している．"}],"abstractLicenseFlag":"allow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410303620066478337","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000009898427"}],"foaf:name":[{"@language":"ja","@value":"中島 裕"},{"@language":"en","@value":"NAKAJIMA Yutaka"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Taiheiyo Materials Corporation"},{"@language":"ja","@value":"太平洋マテリアル株式会社"}]},{"@id":"https://cir.nii.ac.jp/crid/1410022167032750592","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000018368641"}],"foaf:name":[{"@language":"ja","@value":"山田 一夫"},{"@language":"en","@value":"YAMADA Kazuo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Manager, Cement Chemistry Team, Research & Development Center"},{"@language":"ja","@value":"中央研究所　研究開発部　セメント化学チーム　リーダー"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"13448773"},{"@type":"LISSN","@value":"13448773"},{"@type":"EISSN","@value":"27596826"},{"@type":"NDL_BIB_ID","@value":"000000106077"},{"@type":"ISSN","@value":"13448773"},{"@type":"NCID","@value":"AA11362439"}],"prism:publicationName":[{"@language":"ja","@value":"太平洋セメント研究報告"},{"@language":"en","@value":"Journal of Research of the Taiheiyo Cement Corporation"}],"dc:publisher":[{"@language":"en","@value":"Taiheiyo Cement Corporation Central Research Laboratory"},{"@language":"ja","@value":"太平洋セメント株式会社中央研究所"}],"prism:publicationDate":"2004-07-20","prism:volume":"2004","prism:number":"146","prism:startingPage":"11","prism:endingPage":"20"},"url":[{"@id":"http://id.ndl.go.jp/bib/7049171"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I7049171"}],"availableAt":"2004-07-20","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Cement","dc:title":"Cement"},{"@id":"https://cir.nii.ac.jp/all?q=Poly%20%CE%B2-naphthalene%20sulfonate%20condensate%20superplasticizer","dc:title":"Poly β-naphthalene sulfonate condensate superplasticizer"},{"@id":"https://cir.nii.ac.jp/all?q=Adsorption","dc:title":"Adsorption"},{"@id":"https://cir.nii.ac.jp/all?q=Alkali%20sulfate","dc:title":"Alkali sulfate"},{"@id":"https://cir.nii.ac.jp/all?q=Free%20lime","dc:title":"Free lime"},{"@id":"https://cir.nii.ac.jp/all?q=Calcium%20sulfate","dc:title":"Calcium sulfate"},{"@id":"https://cir.nii.ac.jp/all?q=Hydrate","dc:title":"Hydrate"},{"@id":"https://cir.nii.ac.jp/all?q=Sulfate%20ion","dc:title":"Sulfate ion"},{"@id":"https://cir.nii.ac.jp/all?q=%E3%82%BB%E3%83%A1%E3%83%B3%E3%83%88","dc:title":"セメント"},{"@id":"https://cir.nii.ac.jp/all?q=%CE%B2-%E3%83%8A%E3%83%95%E3%82%BF%E3%83%AC%E3%83%B3%E3%82%B9%E3%83%AB%E3%83%9B%E3%83%B3%E9%85%B8%E7%B3%BB%E9%AB%98%E6%80%A7%E8%83%BD%E6%B8%9B%E6%B0%B4%E5%89%A4","dc:title":"β-ナフタレンスルホン酸系高性能減水剤"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%90%B8%E7%9D%80","dc:title":"吸着"},{"@id":"https://cir.nii.ac.jp/all?q=%E7%A1%AB%E9%85%B8%E3%82%A2%E3%83%AB%E3%82%AB%E3%83%AA","dc:title":"硫酸アルカリ"},{"@id":"https://cir.nii.ac.jp/all?q=%E3%83%95%E3%83%AA%E3%83%BC%E3%83%A9%E3%82%A4%E3%83%A0","dc:title":"フリーライム"},{"@id":"https://cir.nii.ac.jp/all?q=%E7%9F%B3%E8%86%8F","dc:title":"石膏"},{"@id":"https://cir.nii.ac.jp/all?q=%E6%B0%B4%E5%92%8C%E7%89%A9","dc:title":"水和物"},{"@id":"https://cir.nii.ac.jp/all?q=%E7%A1%AB%E9%85%B8%E3%82%A4%E3%82%AA%E3%83%B3","dc:title":"硫酸イオン"}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2013942110"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I7049171"},{"@type":"CIA","@value":"40006367859"}]}