公开(公告)号：US10577284B2

公开(公告)日：2020-03-03

申请号：US16019739

申请日：2018-06-27

Applicant: GCP Applied Technologies Inc.

Inventor： Ezgi Yurdakul ,  Damla Boyer ,  Klaus-Alexander Rieder ,  Yohannes K. Lemma

IPC: C04B28/28 ,  C04B28/24 ,  C04B24/42 ,  C04B40/00 ,  C04B40/02 ,  C04B28/02 ,  C04B103/24 ,  C04B111/00 ,  C04B103/40 ,  C04B103/00

Abstract: The present invention provides an admixture composition comprising a liquid suspension of colloidal silica, siloxane, and polycarboxylate polymer cement dispersant for enhancing early age strength, finishability, and other properties in hydratable cementitious compositions such as concrete (e.g., shotcrete). An inventive method involves mixing the components together in a specific sequence, thereby to obtain a stable liquid suspension. This attainment of a stable liquid suspension is surprising and unexpected because (i) the polycarboxylate polymer cement dispersant and siloxane components are incompatible and immiscible with one another; and (ii) that colloidal silica and siloxane compound are incompatible and immiscible with one another. Yet, the present inventors achieved an additive in the form of a stable liquid suspension which can be conveniently dosed into concretes and shotcrete mixtures, to enhance early age strength, and to improve workability and rheology in terms of finishability of concrete surfaces and improved rebound performance in shotcrete applications.

公开(公告)号：US20200308048A1

公开(公告)日：2020-10-01

申请号：US16755569

申请日：2017-10-13

Applicant: GCP Applied Technologies Inc.

Inventor： Zen Chun ,  Klaus-Alexander Rieder ,  Ezgi Yurdakul ,  Antonio J. Aldykiewicz

IPC: C04B2/06 ,  C04B20/10 ,  C04B28/04 ,  C04B28/10 ,  C04B22/00

Abstract: The present invention provides a liquid composition of quicklime particles within an alkylene glycol-based paste or slurry environment, which allows for pumpability and meterability of a liquid composition into cementitious materials such as concrete and mortar. Treated quicklime particles of the present invention manifest an unexpected and surprising hydration induction postponement behavior, as demonstrated through calorimetric testing.