MICROSTRUCTURE DEVELOPMENT IN BLENDED CEMENTS MADE WITH MEDIUMGRADE CALCINED KAOLINITIC CLAYS: EFFECT ON DURABILITY INDICATORS

被引：0
|
作者：
Humberto, Martin N. [1 ]
Tironi, Alejandra [1 ]
Scian, Alberto N. [2 ]
Irassar, Edgardo F. [1 ]
机构：
[1] CONICET CICPBA UNCPBA, Ctr Prov Bs As, Ctr Invest Fis & Ingn, Fac Ingn, Av Valle 5737, Olavarria, Argentina
[2] CICPBA CONICET La Plata UNLP, Ctr Tecnol Recursos Minerales & Ceram, Con Centenario & 506 MB Gonnet, RA-1897 Buenos Aires, DF, Argentina
来源：
AVANCES EN CIENCIAS E INGENIERIA | 2021年 / 12卷 / 01期
关键词：
calcined kaolinitic clays; microstructure; water absorption; water vapor diffusion; HIGH-PERFORMANCE CONCRETE; POZZOLANIC ACTIVITY; METAKAOLIN;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The objective of this work is to evaluate the influence of the structural arrangement of kaolinite present in medium grade clays, calcined and ground, on the development of the microstructure of pastes and its effect on durability indicators. For this purpose, three kaolinitic clays were used, then blended cements containing 25% of calcined clays were elaborated. The evolution of the microstructure in pastes was studied using XRD, DTA/TG and MIP. Two durability indicators were determined in mortars at 28 days: capillary suction velocity and water vapor diffusion coefficient. The results obtained show that, for clays with similar kaolinite content, the disordered structure of kaolinite will favor resistance to water transport (smaller pore volume with diameter greater than 60 nm) and will not be favorable for water vapor transport (larger pore volume with diameter less than 30 nm).
引用
收藏
页码：45 / 56
页数：12
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