Potentialities of metakaolin and crushed waste calcined clay brick as partial replacement of Portland cement

Revista Brasileira de Engenharia Agrícola e Ambiental

Farias Filho, João de¹  Rolim, Joselma Santos²  Toledo Filho, Romildo Dias³ 

[1] UFPB, Campina Grande;UFRJ, Rio de Janeiro

关键词: Portland cement;    metakaolin;    mortar;    compressive strength;    flexural strength    INTRODUÇÃO Antes do surgimento do cimento Portland;    em 1824;    argamassas e concretos eram produzidos usando-se uma mistura de materiais pozolânicos e cal;   

DOI  :  10.1590/S1415-43662000000300021

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

This paper evaluates the potentiality of metakaolin and crushed waste fired clay brick as cement replacement materials. They were characterised physically, chemically and mineralogically and their activity with Portland cement determined. The influence of the partial replacement of Portland cement on the development of compressive and flexural strength was evaluated until the age of, respectively, 365 and 208 days. The percentage of cement replacement, in weight, ranged from 20 to 50%, whereas the water/cement ratio ranged from 0.37 to 0.45. The results obtained show that the metakaolin and crushed calcined clay brick presented a good pozolanic activity and that the compressive strength of the blended mortars after 28 days of cure was higher than that observed for the reference Portland cement for all levels of cement replacement and water/cement ratio. A mathematical model to predict the compressive strength is proposed based on a factorial design of experiments.

【 授权许可】

CC BY-NC