Compressive Strength Test and Energy Characteristics Analysis of Alkali Slag Ceramsite Concrete at Different Ages

Abstract

Abstract: Alkali slag ceramsite concrete made by coal gangue ceramsite and slag can realize the reuse of solid wastes such as coal gangue and slag. To investigate the influences of curing age and ceramsite content on compressive strength and energy characteristics of alkali slag ceramsite concrete, uniaxial compression tests were carried out for alkali slag ceramsite concrete under different curing ages (1 d, 3 d, 7 d, 14 d, and 28 d) and different ceramsite volume content (0%, 25%, 50%, 75%, and 100%). Test results show that stress-strain curves of concrete under different ages and ceramsite content all undergo four stages, including compaction stage, elastic deformation stage, crack propagation stage, and failure stage. Moreover, the addition of coal gangue ceramsite makes the concrete show a certain ductility characteristic. Both compressive strength and elastic modulus are positively related to curing age in an exponential function, and negatively related to ceramsite content in a quadratic function. With the increase of curing age, total energy and elastic energy increase, while dissipative energy decreases first and then increases. With the increase of ceramsite content, total energy and elastic energy decrease, while dissipative energy increases first and then deceases.

Key words: alkali slag ceramsite concrete, coal gangue ceramsite, slag, age, compressive strength, energy characteristic

CLC Number:

TU528

YUAN Pu, ZHU Yisheng. Compressive Strength Test and Energy Characteristics Analysis of Alkali Slag Ceramsite Concrete at Different Ages[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2292-2298.

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