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公开(公告)号：US20210371337A1
公开(公告)日：2021-12-02
申请号：US17050099
申请日：2018-05-11
Applicant: GCP Applied Technologies Inc.
IPC: C04B18/02
Abstract: Method and composition for producing aggregates from cement and concrete, including residual or returned concrete. Exemplary methods involve the use of an aggregate-forming inducer that provides a surface anchoring site for cement paste to bond/adhere, such as shredded news print, cardboard, or mixtures thereof, and also including fiber materials such as polymers, glass, and other material fibers. The aggregate-forming inducer is mixed with fresh concrete until aggregates are formed.
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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
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.
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公开(公告)号：US20190002349A1
公开(公告)日：2019-01-03
申请号：US16019739
申请日：2018-06-27
Applicant: GCP Applied Technologies Inc.
Inventor： Ezgi YORDAKUL , Damla BOYER , Klaus-Alexander RIEDER , Yohannes K. LEMMA
CPC classification number: C04B28/28 , C04B24/42 , C04B28/02 , C04B28/24 , C04B40/0032 , C04B40/0039 , C04B40/029 , C04B2103/0051 , C04B2103/24 , C04B2103/408 , C04B2111/00155 , C04B2201/05 , C04B14/042 , C04B14/045 , C04B14/062 , C04B14/066 , C04B14/10 , C04B18/146 , C04B20/008 , C04B22/06 , C04B22/064 , C04B22/066 , C04B22/143 , C04B24/02 , C04B24/06 , C04B24/12 , C04B24/16 , C04B24/18 , C04B24/20 , C04B24/2647 , C04B24/38 , C04B24/383 , C04B2103/12 , C04B2103/22 , C04B2103/302 , C04B2103/44 , C04B2103/54 , C04B2103/58 , C04B2103/61 , C04B2103/65 , C04B2103/67 , C04B7/02
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.
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