Impact of physical and physicochemical properties of supplementary cementitious materials on structural build-up of cement-based pastes

被引：78

作者：

Navarrete, Ivan ^{[1
,2
]}

Kurama, Yahya ^{[2
]}

Escalona, Nestor ^{[3
,4
,5
,6
]}

Lopez, Mauricio ^{[1
,7
]}

机构：

[1] Pontificia Univ Catolica Chile, Sch Engn, Dept Construct Engn & Management, Vicuna Mackenna 4860,Casilla 306,Correo 22, Santiago, Chile

[2] Univ Notre Dame, Coll Engn, Dept Civil & Environm Engn & Earth Sci, Notre Dame, IN 46556 USA

[3] Pontificia Univ Catolica Chile, Fac Quim & Farm, Vicuna Mackenna 4860, Santiago, Chile

[4] Pontificia Univ Catolica Chile, Sch Engn, Dept Chem Engn & Bioproc, Vicuna Mackenna 4860, Santiago, Chile

[5] Pontificia Univ Catolica Chile, Res Ctr Nanotechnol & Adv Mat CIEN UC, Vicuna Mackenna 4860, Santiago, Chile

[6] Millennium Nuclei Catalyt Proc Sustainable Chem C, Santiago, Chile

[7] Pontificia Univ Catolica Chile, Ctr Sustainable Urban Dev CEDEUS, Santiago, Chile

来源：

CEMENT AND CONCRETE RESEARCH | 2020年 / 130卷 / 130期

关键词：

Thixotropy; Rheology; Static yield stress; Mineral admixtures; Early age hydration; SELF-CONSOLIDATING CONCRETE; HIGH-PERFORMANCE CONCRETE; YIELD-STRESS; RHEOLOGICAL PROPERTIES; FLY-ASH; MINERAL ADMIXTURES; HYDRATION KINETICS; FRESH CONCRETE; TEMPERATURE; NUCLEATION;

D O I：

10.1016/j.cemconres.2020.105994

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Understanding the structural build-up is relevant to new technologies that require workability control, such as 3D concrete printing. The effect of supplementary cementitious materials (SCM) particle size (i.e. specific surface area and particle density) and physicochemical behavior (i.e., chemical reactivity and surface potential) and their interactions with the primary mixture parameters (i.e., water to cement ratio, cement reactivity and SCM replacement) on the structural build up of cementitious paste were studied. The growth of static yield stress with time was used to characterize the structural build up of cementitious pastes. Calorimetric curves were also measured. Results showed that the effect of SCM on structural build up is governed by their particle density and surface potential. The structural build up can be raised by increasing the number of contact points (governed by particle density and w/c), the growth rate of C-S-H bridges (governed by surface potential), or the reactivity of cement.

引用

页数：16

共 88 条

[1] Thixotropy and structural breakdown properties of self consolidating concrete containing various supplementary cementitious materials [J].