关键词: 沙漠地区;强度;抗裂性能;圆环法

Abstract: In order to study the development law of concrete strength and crack resistance of concrete of different strength grades under different curing methods in desert area,C35 and C50 concrete were used in the construction site.Through the circle method test to explore the relationship between the concrete strength and crack resistance of the growth,the results show that:(1)Through the analysis of two kinds of strength grade of concrete under different curing method,the strength and crack growth are observed,different curing methods have different effects on the growth of early strength of concrete,the early strength of concrete under heat and wet curing has the fastest growth.(2)In control and external factors and concrete curing conditions of the external influence,concrete cracking time and crack width of high strength are earlier than or greater than the low strength concrete,concrete strength is more prone to cracking.The reasonable curing method has an important influence on restraining and delaying the development of concrete cracks.The cracks of concrete under heat preservation and moisture conservation are late and develop slowly.(3)The development of the cracks and concrete early strength growth are closely related,through the concrete strength and crack growth curve under different curing method analysis,crack ring cracks on concrete strength is the fastest growing stage,so attention should be paid to the prevention and control of cracks in actual engineering concrete early strength growth process.

Key words: desert area;strength;crack resistance;circle method