Characteristics of Interface Transition Zone of Waste Tire Rubber Concrete

Abstract

Abstract: SEM, EDS and other equipments were used to study the micro morphology, hydration product distribution and the width of interface transition zone (ITZ) in 1 mm to 3 mm waste tire rubber concrete. The results show that the interface bond between rubber and cement stone in rubber concrete is weaker than that between coarse aggregate and cement stone, that means rubber concrete has looser structure and higher porosity of ITZ than ordinary concrete.The content of hydrated calcium silicate (C-S-H) in hydrated products of ITZ of rubber concrete is less than that of ordinary concrete, while the content of calcium hydroxide (CH) and ettringite (AFt) crystals is higher than that of ordinary concrete. The width of ITZ of 1 mm to 3 mm waster tire rubber concrete is about 50 μm, while that of ordinary concrete is only 40 μm, so rubber concrete have more unstable interface transition zone.

Key words: waste tire rubber concrete, interfacial transition zone, hydration product, element distribution

CLC Number:

TQ171

ZHU Xingtong, GENG Ou, ZHU Siyuan. Characteristics of Interface Transition Zone of Waste Tire Rubber Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 573-578.

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