公开(公告)号：US20030167973A1

公开(公告)日：2003-09-11

申请号：US10308633

申请日：2002-12-03

Applicant: Boral Material Technologies, Inc.

Inventor： Pepi Peev ,  Russell L. Hill

IPC: C04B024/12

CPC classification number: C04B24/128 ,  C04B22/14 ,  C04B24/122 ,  C04B24/32 ,  C04B28/04 ,  C04B2201/05 ,  Y02W30/92 ,  C04B2103/10 ,  C04B2103/32 ,  C04B18/08 ,  C04B24/12 ,  C04B24/2641

Abstract: The present invention is an admixture for cementitious compositions that provides both good flowability and high early strength as is desired in the art. The admixture of the invention includes a superplasticizer comprising a water-soluble modified acrylic copolymer and at least one accelerant selected from the group consisting of salts of thiocyanic acid, water-soluble alkanolamines, ethylene oxide adducts of ethylenediamine, and morpholine derivatives. The combination of the superplasticizer and the accelerant used in the invention surprisingly has a synergistic effect on the early compressive strength of the cementitious composition and also enhances the W/CM ratio and the flowability of the cementitious composition.

Abstract translation: 本发明是水泥组合物的混合物，其提供了本领域所需的良好的流动性和高的早强度。 本发明的混合物包括含有水溶性改性丙烯酸共聚物和选自硫氰酸盐，水溶性链烷醇胺，乙二胺的环氧乙烷加成物和吗啉衍生物的至少一种促进剂的超增塑剂。 本发明中使用的超增塑剂和促进剂的组合令人惊奇地对水泥质组合物的早期抗压强度具有协同效应，并且还提高了水泥组合物的W / CM比和流动性。

公开(公告)号：US5840114A

公开(公告)日：1998-11-24

申请号：US648970

申请日：1996-05-17

Applicant: Ara Avedis Jeknavorian ,  Ahmad Arfaei ,  Neal Steven Berke ,  David Charles Darwin ,  Ellis Martin Gartner ,  Leslie Ann Jardine ,  James Franklin Lambert ,  Lawrence Reeder Roberts

Inventor： Ara Avedis Jeknavorian ,  Ahmad Arfaei ,  Neal Steven Berke ,  David Charles Darwin ,  Ellis Martin Gartner ,  Leslie Ann Jardine ,  James Franklin Lambert ,  Lawrence Reeder Roberts

IPC: C04B24/26 ,  C04B24/32 ,  C04B28/02 ,  C08F8/30 ,  C08F8/32 ,  C08F8/48 ,  C08K3/34 ,  C04B22/08 ,  C04B24/04

CPC classification number: C04B24/2658 ,  C04B28/02 ,  C04B40/0039 ,  C08F8/32 ,  C08F8/48 ,  C08K3/34 ,  C04B2103/001 ,  C04B2201/05

Abstract: A high early strength admixture for precast hydraulic cement comprises a calcium salt and a copolymer having a carbon-containing backbone to which are attached cement-anchoring members, such as carboxyl groups, and to which are also attached oxyalkylene pendant groups by linkages selected from the group consisting of amide and imide members. The copolymers used are preferably formed by reacting an acrylic polymer with ammonia or an alkoxylated amine. The calcium salt, preferably calcium nitrite, and the copolymer can be added simultaneously as one admixture, or separately. The invention relates also to methods for enhancing high early strength in concrete, cement, masonry, and mortar mixtures generally, and to precast concrete particarly, and also pertains to such hydraulic mixtures containing the calcium salt and copolymer.

Abstract translation: 用于预制水硬性水泥的高的早期强度外加剂包括钙盐和具有含碳骨架的共聚物，其中连接有水泥锚固构件，例如羧基，并且还通过选自以下的链中的连接氧基亚烷基侧基 由酰胺和酰亚胺成员组成的组。 所使用的共聚物优选通过丙烯酸类聚合物与氨或烷氧基化胺反应形成。 钙盐，优选亚硝酸钙和共聚物可以作为一种混合物同时加入，或分开加入。 本发明还涉及通常用于提高混凝土，水泥，砌筑和砂浆混合物的高早强的方法，并且具体地预制混凝土，并且还涉及含有钙盐和共聚物的这种水力混合物。