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Waste glass powder in the recycled concrete auxiliary gelation

Author: YangJing
Tutor: LiRuYan
School: Kunming University of Science and Technology
Course: Materials Processing Engineering
Keywords: Waste glass Recycled concrete Supplementary cementing materials Resource utilization
CLC: TU528
Type: Master's thesis
Year: 2010
Downloads: 95
Quote: 0
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Abstract

With the accelerating process of urbanization in China, the consequent construction waste problem more and more widespread concern. Waste glass and waste concrete is an important part of construction waste, both of which are non-biodegradable materials, and how effective they RECYCLING become a pressing problem. Recycled concrete waste concrete recycling construction waste recycling technology research direction, through the analysis of the main chemical composition and physical properties of the waste glass and read the extensive literature that ground to a specific particle size waste The glass soot can show some pozzolanic activity, with the potential role of supplementary cementing. The topics will waste glass as a supplementary cementitious materials simultaneously applied to recycled concrete test analysis, summarized waste glass recycled concrete applications suitable conditions so as to achieve the waste glass and waste concrete construction waste full recycling purposes, to lay the foundation for further study of waste glass recycled concrete and even ordinary concrete. Little research carried out on the waste glass for supplementary cementing materials, its research innovation. Waste glass as the feasibility of supplementary cementing materials theoretically discussed by comparing the morphology and composition analysis of the cement paste mixed with waste glass powder and fly ash know, in the process of hydration reaction cullet powder and fly ash as a supplementary cementing material the layered fibrous and velvet-like structure of the hydration product, thereby determining The cullet micronized involved in the hydration reaction, and exhibits a certain pozzolanic activity. The compressive strength of the mortar block in the verification test of ISO standard sand mixed with cullet micronized are more than the fly ash sample of the same test conditions hereinafter the same dosage proved cullet the micronized having as an auxiliary gelling the feasibility of the material. In order to examine the feasibility of recycled concrete and glass waste a combination of the two, the rest of this article with reference to the regeneration of the requirements of the ISO standard sand particle size distribution of fine aggregate, made of mortar to create a similar to the regeneration of the physical chemistry of the concrete environment, stimulate waste glass powders particle size, ash, water-cement ratio, chemical agents influencing factors were a set of tests and analyzes, the waste glass micronized drawn optimized as the conditions of use of supplementary cementing materials particle size in 38gm following, dosage for 15% of the ash quality, water-cement ratio of 0.45. Recycled aggregate processing, preparation The array design strength grade C30 recycled concrete waste glass micronized as a supplementary cementitious material incorporated therein, the test results showed that the 7-day compressive strength of the specimen 19.2MPa , 28-day compressive strength of 35.6MPa, reached the design strength and relatively not waste glass powders doped specimen has a better strength development trend, and thus concluded waste glass micronized as a supplementary cementitious materials used in renewable concrete, and made a few suggestions for future work direction.

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