公开(公告)号：US20190135692A1

公开(公告)日：2019-05-09

申请号：US15790857

申请日：2017-10-23

Applicant: GCP Applied Technologies Inc.

Inventor： Lawrence L. Kuo ,  Shuqiang Zhang ,  Hideo KOYATA

IPC: C04B24/26 ,  C04B14/06 ,  C04B7/02

Abstract: The present invention provides a method and admixture composition for making hydratable cementitious compositions, ones believed to have much less stickiness in comparison to prior methods. Decreased stickiness in concrete mixes means that they are easier to pour or to cast into place, as well as easier to finish. Dispersant carboxylate polymers of the invention having this ability are characterized by possessing two different, relatively short chain lengths of polyalkyleneoxide units and low weight-average molecular weights.

公开(公告)号：US20200048152A1

公开(公告)日：2020-02-13

申请号：US16341752

申请日：2017-10-11

Applicant: GCP Applied Technologies Inc.

Inventor： Elizabeth BURNS ,  Nathan A. TREGGER ,  Hideo KOYATA ,  Lawrence L. KUO ,  Klaus-Alexander RIEDER ,  Mark F. ROBERTS ,  David MYERS

IPC: C04B40/00 ,  C04B14/06 ,  C04B24/38 ,  C04B16/06 ,  C04B28/28 ,  C04B24/32

Abstract: The present invention relates to very high workable yet controllable concrete mix design, admixture composition, and process for placing concrete. The mix design relates to particular aggregate/cement ratios and types which are characteristic of ready mix concrete (RMC), which provide high fluidity reminiscent of self-consolidating concrete (SCC), and which provides advantages over both RMC and SCC in terms of ease and speed in placement and finishability at the construction site placement zone, regardless of whether into a horizontal formwork (e.g., for slabs, floors) or into vertical formwork (e.g., for blocks, walls, columns, etc.), without loss of control and without generating high risks of segregation even when small amounts of water are added at the size to facilitate finishing of the concrete surface. An inventive admixture combination which enables this unique design involves two different polycarboxylate comb polymers in combination with two specific viscosity modifying agents, and this combination provides highly workable concrete to be placed in a controlled, efficient manner.