Development of a new rapid, relevant and reliable (R3) test method to evaluate the pozzolanic reactivity of calcined kaolinitic clays

被引：429

作者：

Avet, Francois ^{[1
]}

Snellings, Ruben ^{[1
,2
]}

Alujas Diaz, Adrian ^{[3
]}

Ben Haha, Mohsen ^{[4
]}

Scrivener, Karen ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, STI IMX LMC, Lab Construct Mat, Stn 12, CH-1015 Lausanne, Switzerland

[2] Vlaamse Instelling Technol Onderzoek, Sustainable Mat Management, B-2400 Mol, Belgium

[3] Univ Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba

[4] Heidelberg Technol Ctr GmbH, Rohrbacher Str 95, D-69181 Leimen, Germany

来源：

CEMENT AND CONCRETE RESEARCH | 2016年 / 85卷

关键词：

Kaolinitic calcined clays; Hydration; Calorimetry; CaCO3; Thermal treatment; PORTLAND-CEMENT; TEMPERATURE; HYDRATION; MICROSTRUCTURE;

D O I：

10.1016/j.cemconres.2016.02.015

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The present paper introduces a new rapid, relevant and reliable (R-3) test to predict the pozzolanic activity of calcined clays with kaolinite contents ranging from 0 to 95%. The test is based on the correlation between the chemical reactivity of calcined clays in a simplified system and the compressive strength of blends in standard mortar. The simplified system consists of calcined clay portlandite and limestone pastes with sulfate and alkali levels adjusted to reproduce the reaction environment of hydrating blended cements. The pastes were hydrated for 6 days at 20 degrees C or for 1 day at 40 degrees C. The chemical reactivity of the calcined clay can be obtained first by measurement of the heat release during reaction using isothermal calorimetry and second by bound water determination in a heating step between 110 degrees C and 400 degrees C. Very good correlations were found between the mortar compressive strength and both measures of chemical reactivity. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1 / 11

页数：11

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