Study on Crack Control of Abrasion Resistant Concrete
The temperature crack of concrete is caused by the large temperature difference between inside and outside due to the large amount of hydration heat generated in the process of cement hardening.Weir body concrete of a project is divided into two phases.The interval time is long and the strength level is different by 3 levels.The distance between the steel bar is small and the diameter is large.The slope of weir body is steep.and it is difficult to put concrete into silo.The second phase of concrete pouring is carried out on the step foundation of the first phase.The crack occurs because of the concentrated top angle stress of the step and the weakest of the force.In the construction,the principle of internal reduction and external protection is adopted from the mixture ratio,raw material quality,structure optimization,steam maintenance and temperature control measures of the system.No cracks were found after three weir concrete placement test.The appearance quality is good,and the purpose of preventing cracks has been achieved.
abrasion resistant concretecrack controltemperature control measurestemperature stressmix ratio
国家科技期刊平台
NSTL
万方数据
