Control of dry shrinkage crack in pumped commercial concrete;

Reasons analysis of dry shrinkage crack of cement stabilized gravel base course;

This article carries out overall analysis on the mechanism and influencing factors of dry shrinkage in cement stabilized base materials, and proposes effective preventive measures on the basis of the analysis, in order to reduce dry shrinkage crack in cement stabilized base materials.

Cause analysis on desiccation crack of cast-in-place floor slab and its prevention;

According to the experience in engingeering practices,the characteristics of the commom cracks,such as wall crack,desiccation crack and ground crack are summed up in this paper,the causes of the cracks are analyzed and the preventive measures are put forward.

According to temperature crack and desiccation crack of brick-mixing structure, it analyzes its cause and features of cracks, and puts forward prevention measures from setting expansion joint、adopting ferroconcrete roof、setting reinforcement band.

According to temperature cracks,plastic shrinkage cracks,shrinkage cracks and interfacial cracks their causing reasons are analyzed;at the same time corresponding control measures are proposed in order to ensure construction quality of transfer beam.

The production reason of the concrete slab crack was summarized through analysis and deal with the cast-in-place concrete slab shrinkage crack.

The polypropylene fiber can effectively control the length, width and number of the drying shrinkage crack of early-age concrete.