Efficiency of mineral admixtures in mortars: Quantification of the physical and chemical effects of fine admixtures in relation with compressive strength
Efficiency of mineral admixtures in mortars: Quantification of the physical and chemical effects of fine admixtures in relation with compressive strength
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DOI：
10.1016/j.cemconres.2005.07.001
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发表时间：
2006-02-01
影响因子：
11.4
通讯作者：
Ringot, E
中科院分区：
文献类型：
--
作者：
Cyr, M;Lawrence, P;Ringot, E
这项工作是一个整体项目的第四部分，其目的是为含有不同种类的矿物掺合料的混凝土的一般配合比设计规则的发展。前两部分介绍了分离和量化，通过基于半绝热量热法测量的经验模型，不同的物理效应负责水泥水化（短期）的变化时，化学惰性石英粉用于砂浆。第三部分涉及一个密集的实验计划，提出并评论了2000多个抗压强度测量。该计划涉及1天至6个月的砂浆，其中含有高达75%的惰性和火山灰外加剂。在第四部分中，对所有这些抗压强度结果进行了分析，并区分和定量评价了稀释、异相成核和火山灰效应三种效应的影响。为了从物理和化学两个角度考虑矿物掺合料在砂浆中的作用，提出了效率的概念。它使用了一个效率函数xi（p），它具有显著的性质：它与时间无关，与细度无关，与矿物掺合料的类型无关。(c)2005爱思唯尔有限公司保留所有权利。
This work is the fourth part of an overall project the aim of which was the development of general mix design rules for concrete containing different kinds of mineral admixtures. The two first parts presented the separation and quantification, by means of an empirical model based on semi-adiabatic calorimetry measurements, of the different physical effects responsible for changes in cement hydration (short terms) when chemically inert quartz powders were used in mortars. Part three dealt with an intensive experimental program, presenting and commenting more than 2000 compressive strength measurements. This program concerned 1 day to 6 months old mortars containing up to 75% of inert and pozzolanic admixtures. All these compressive strength results are analyzed in this fourth part and the influence of three effects, namely dilution, heterogeneous nucleation and the pozzolanic effect, are discriminated and quantitatively evaluated. An efficiency concept is proposed in order to take into account the effect of mineral admixture in mortars from both the physical and chemical points of view. It uses an efficieney function xi(p) that has notable properties: it is independent of time, independent of fineness and independent of the type of mineral admixture. (c) 2005 Elsevier Ltd. All rights reserved.