Journal ArticleDOI
Metakaolin and calcined clays as pozzolans for concrete: a review
B.B. Sabir,S. Wild,J. Bai +2 more
TLDR
The use of metakaolin (MK) as a pozzolanic material for mortar and concrete has received considerable attention in recent years as mentioned in this paper, which is part of the widely spread attention directed towards the utilisation of wastes and industrial by-products in order to minimise Portland cement consumption, the manufacture of which being environmentally damaging.Abstract:
The utilisation of calcined clay, in the form of metakaolin (MK), as a pozzolanic material for mortar and concrete has received considerable attention in recent years. This interest is part of the widely spread attention directed towards the utilisation of wastes and industrial by-products in order to minimise Portland cement (PC) consumption, the manufacture of which being environmentally damaging. Another reason is that mortar and concrete, which contain pozzolanic materials, exhibit considerable enhancement in durability properties. This paper reviews work carried out on the use of MK as a partial pozzolanic replacement for cement in mortar and concrete and in the containment of hazardous wastes. The literature demonstrates that MK is an effective pozzolan which causes great improvement in the pore structure and hence the resistance of the concrete to the action of harmful solutions.read more
Citations
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Journal ArticleDOI
Supplementary cementitious materials
TL;DR: The use of silica-rich SCMs influences the amount and kind of hydrates formed and thus the volume, the porosity and finally the durability of these materials.
Journal ArticleDOI
Mechanism of geopolymerization and factors influencing its development: a review
Divya Khale,Rubina Chaudhary +1 more
TL;DR: In this paper, the authors present the work carried out on the chemical reaction, the source materials, and the factor affecting geopolymerization, and demonstrate that certain mix compositions and reaction conditions such as Al2O3/SiO2, alkali concentration, curing temperature with curing time, water/solid ratio and pH significantly influences the formation and properties of a geopolymers.
Journal ArticleDOI
Cement substitution by a combination of metakaolin and limestone
TL;DR: In this paper, the coupled substitution of metakaolin and limestone in Portland cement (PC) was investigated and the mechanical properties were studied in mortars and the microstructural development in pastes by X-ray diffraction, thermogravimetry analysis, mercury intrusion porosimetry and isothermal calorimetry.
Journal ArticleDOI
The origin of the pozzolanic activity of calcined clay minerals: A comparison between kaolinite, illite and montmorillonite
TL;DR: In this paper, the decomposition of three clayey structures (kaolinite, illite and montmorillonite) when thermally treated at 600 degrees C and 800 degrees C was investigated and the effect of this treatment on their pozzolanic activity in cementitious materials.
Journal ArticleDOI
Compressive strength, chloride diffusivity and pore structure of high performance metakaolin and silica fume concrete
TL;DR: In this paper, the authors compared the mechanical and durability properties of high performance metakaolin and silica fume concretes to their microstructure characteristics, and found that the effect of metakaolins on the interfacial porosity is discussed based on test results.
References
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Book
The chemistry of cements
TL;DR: An international symposium on the chemistry of cements, organized by the Royal Swedish Institute for Engineering Research and the Swedish Cement Association, was held in Stockholm on July 6-8 and attended by representatives from Great Britain, Canada, the United States and many of the European countries.
Journal ArticleDOI
Relative strength, pozzolanic activity and cement hydration in superplasticised metakaolin concrete
TL;DR: In this paper, the role of metakaolin (MK) in enhancing the strength of concrete is reviewed and principal mechanisms identified, and the observed results establish that there is an optimum OPC replacement level of 20 wt% MK and that the contribution which MK makes to strength is restricted beyond 14 days.
Book
Pozzolanic and cementitious materials
V. M. Malhotra,P.K. Mehta +1 more
TL;DR: The sources of production and utilization rate chemical and physical characteristics mechanisms by which mineral admixtures improve properties of concrete are discussed in this paper, where they select materials and mixture proportions according to standard specifications.
Journal ArticleDOI
The KaoIinite-Mullite Reaction Series: I, A Survey of Outstanding Problems
G. W. Brindley,M. Nakahira +1 more
TL;DR: A survey of the reaction series of metakaolin can be found in this paper, where the authors provide the necessary historical background for a new approach to their solution, and the present survey brings these problems into sharp focus.
Journal ArticleDOI
Effect of admixtures on the setting times of high-strength concrete
TL;DR: In this paper, the effect of silica fume (SF), metakaolin (MK), fly ash (FA) and ground granulated blast-furnace slag (GGBS) on the setting times of high-strength concrete has been investigated using the penetration resistance method (ASTM C 403).
Related Papers (5)
Influence of metakaolin on the properties of mortar and concrete: A review
Rafat Siddique,Juvas Klaus +1 more