High performance concrete with high volume ultra fine fly ash reinforced with Basalt fibre

Solikin, M 2012, High performance concrete with high volume ultra fine fly ash reinforced with Basalt fibre, Doctor of Philosophy (PhD), Civil, Environmental and Chemical Engineering, RMIT University.


Document type: Thesis
Collection: Theses

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Title High performance concrete with high volume ultra fine fly ash reinforced with Basalt fibre
Author(s) Solikin, M
Year 2012
Abstract The utilization of high strength concrete to support the tall building construction industry is increasing. Nevertheless, the use of Portland cement in concrete industry is one of the CO2 emission sources. Hence, significant increase of the use of fly ash as a cementitious material for partially replacing cement will lead to a significant impact in reducing the greenhouse gas emission. On the other hand, high strength concrete has one main weakness, the increase of relative brittleness. This weakness could be balanced by adding fibres in it. One of the new types of fibres is basalt fibre that has good resistance to chemical attack, and good resistance in impact load and fire.

This research deploys design of experiment method to examine the use of low water binder ratio in producing high strength mortar using high volume ultra fine fly ash (HVUFFA). At this stage, the study on using saturated lime water as mixing water in mortar was conducted to investigate the strength development of fly ash lime mortar. It was found that the use of saturated lime water in high volume ultra fine fly ash mortar gives the same strength and strength development as those in ordinary Portland cement (OPC) mortar. The experiment was continued by further investigation on the use of lime water, high volume ultra fine fly ash and the use of basalt fibre to produce high strength concrete. The design experiment method was used to study how each factor gave influence on concrete properties and to find out the optimum mix design in producing high performance concrete using HVUFFA incorporated with basalt fibre. The test comprised the strength and durability test of high strength concrete.

The result shows that the brittleness of basalt fibre in alkali environment made it inappropriate to use as concrete fibre. Besides, the combination of using high volume fly ash concrete and lime water can produce high strength concrete with high performance properties as it increases compressive strength development and enhances the durability of concrete, especially in reducing chloride ion penetrability.
Degree Doctor of Philosophy (PhD)
Institution RMIT University
School, Department or Centre Civil, Environmental and Chemical Engineering
Keyword(s) High strength concrete
high volume ultra fine fly ash
design of experiment
lime water
basalt fibre
durability
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Created: Mon, 17 Sep 2012, 10:03:50 EST by Brett Fenton
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