WO2018025431 (A1)

Cement additive and cement composition

(22) 22.02.2017

(43) 08.02.2018

(57) The purpose of the invention is to provide a cement additive and a cement composition which have excellent solution stability, achieve a good fluidity holding effect and an autogenous shrinkage reducing effect for cement concrete, and which exhibit immediate and sustained hexavalent chromium reduction. The present invention provides: a cement additive which is a mixture of a lime sulphur mixture having a pH of 10 or more and an oxidation-reduction potential (ORP) of -450 mV or less and one or more types of a liquid water reducing agent selected from naphthalenes, melamines, aminosulfonic acids, polycarboxylic acids, or polyethers; the abovementioned cement additive wherein the liquid water reducing agent has a pH of 8 or more; the abovementioned cement additive wherein the lime sulphur mixture includes 5 to 15 % by mass of Ca in terms of T-Ca, 15 to 30 % by mass of S in terms of T-S, and 0.03 to 2.0 % by mass of Mg in terms of MgO; and a cement composition containing cement and the cement additive.

(71) Denka Company Ltd (JP)

x

Related articles:

Issue 1-2/2018 WO 2017/179121 A1

Cement additive and cement composition

(22) 12.04.2016 (43) 19.10.2017 (57) Provided are a cement additive and a cement composition that maintain the favorable fluidity of cement concrete, that reduce autogeneous shrinkage, and that...

more
Issue 7-8/2019 US 2019/0127277 A1

Cement additive composition comprising polycarboxylic acid-based copolymer

(22) 08.12.2017 (43) 02.05.2019 (57) The present disclosure relates to a cement additive composition including a polycarboxylic acid-based copolymer. When the cement additive composition of the...

more
Issue 6/2018 WO2018062583 (A1)

Polymer compound for admixture of cement composition

(22) 28.09.2016 (43) 05.04.2018 (57) Disclosed is a polycarboxylic acid-based copolymer compound formed as a result of the copolymerization of a polyalkylene glycol monoalkenyl ether monomer and an...

more
Issue 6/2018 WO 2018/056124 A1

Additive for cement composition and cement composition

(22) 12.09.2017 (43) 29.03.2018 (57) The present invention is an additive for a cement composition, said additive containing a powdered cellulose, and addressing the problem of providing an additive...

more
Issue 6/2019 US 2019/0084881 A1

Cement additive, cement composition, and raw material for cement additive

(22) 07.07.2016 (43) 21.03.2019 (57) Provided is a cement additive that can significantly improve the strength of a cured product of a cement composition over a long time period. Also provided is a...

more