Control of cracks in cast-in-place slab poured with pumped commercial concrete;

Experimental tests showed that polycarboxylate wa ter reducer could be used to prepare C30~C80 ready-mixed pumping concretes, supe r retarding ready-mixed pumping concretes with a retarding period of 80 hrs and marine concretes with high durability.

The preparation technology of high-grade pumped concrete;

Discussion on the design of pumped concrete mix proportion;

Quality control of the pumped concrete construction in a building of dong fang square;

Test of proportion of machine pump concrete and construction control;

Research on the bulkily granular and high flowing pump concrete and its application;

Analysis on the causes and prevention measures of construction cracks of pump concrete;

Prospect of application of pumpcrete mixed with fly-ash to construction of hydraulic tunnel;

Application of downward pumpcrete to build anti-scour wall on left bank of Shuibuya Hydropower Project;

This paper introduces the detection principle of rebound method and the main factors influencing the detection performance, and analyzes the modification of detecting the pumpcrete with rebound method.