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Investigating the influence of basalt as mineral admixture on hydration and microstructure formation mechanism of cement
Highlights We found that the basalt has obvious potential pozzolan activities. The basalt can be used as a new mineral admixture in concrete. Setting and hydration process of cement are retarded by addition of basalt. Basalt does not show negative effect on the compressive strength of concrete.
Abstract Basalt powder is a by-product of basalt stone crushing plant. It is a big problem to propose utilization of these by-products from the aspects of disposal, environmental pollution and health hazards. In this paper, basalt is attempted to manufacture concrete as a new mineral admixture. Firstly, the chemical compositions and the pozzolan activity of the basalt were measured. Secondly, the cementitious paste with basalt powder was prepared and the normal consistency, setting time and the compressive strength were tested. Finally, the isothermal calorimetric measurement, X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) test were conducted to investigate the hydration process and microstructure formation of the basalt blended paste. The results show that the basalt has obvious potential pozzolan activities and can be used as a new mineral admixture. The basalt has retardation effect on the setting and hydration heat evolution process of cement. Besides, early age compressive strength development of the basalt blended paste was normally less than the pure cement paste, but the strength are close at later ages.
Investigating the influence of basalt as mineral admixture on hydration and microstructure formation mechanism of cement
Highlights We found that the basalt has obvious potential pozzolan activities. The basalt can be used as a new mineral admixture in concrete. Setting and hydration process of cement are retarded by addition of basalt. Basalt does not show negative effect on the compressive strength of concrete.
Abstract Basalt powder is a by-product of basalt stone crushing plant. It is a big problem to propose utilization of these by-products from the aspects of disposal, environmental pollution and health hazards. In this paper, basalt is attempted to manufacture concrete as a new mineral admixture. Firstly, the chemical compositions and the pozzolan activity of the basalt were measured. Secondly, the cementitious paste with basalt powder was prepared and the normal consistency, setting time and the compressive strength were tested. Finally, the isothermal calorimetric measurement, X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) test were conducted to investigate the hydration process and microstructure formation of the basalt blended paste. The results show that the basalt has obvious potential pozzolan activities and can be used as a new mineral admixture. The basalt has retardation effect on the setting and hydration heat evolution process of cement. Besides, early age compressive strength development of the basalt blended paste was normally less than the pure cement paste, but the strength are close at later ages.
Investigating the influence of basalt as mineral admixture on hydration and microstructure formation mechanism of cement
Laibao, Liu (author) / Yunsheng, Zhang (author) / Wenhua, Zhang (author) / Zhiyong, Liu (author) / Lihua, Zhang (author)
Construction and Building Materials ; 48 ; 434-440
2013-07-15
7 pages
Article (Journal)
Electronic Resource
English
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