According to case analysis of solving integral drifting problem in PHC pipe pile foundation of a high-rise office building, the comprehensive methods of strengthening the foundation with deepening the concrete infilling in pipe piles and incorporation of PEA expanding agents at the bottom of the cast-in-place piles are presented in this paper.

This paper emphasized on the key techniques double mixing of organic short fiber in AEA expansive agent, best mixing quantities of organic short-fiber and expansive agent, restricted expansion rate after double mixing, compressive strength and bending strength of mortar etc.

Mechanism and model of sulfate attack on RCC with expansive agent;

Investigation on environmentally friendly PFA based expansive agent;

Some considerations on development of expansive agent and expansive concrete in china;

Shrinkage of semi-lightweight concrete with expanding agent;

Setting compound phosphate retarder and reduced type expanding agent for building gypsum;

To systematically study the effects of mineral admixtures such as slag,expanding agent on sulfate resistance of concrete, a series of concrete immersion test was carried out.

Proper use of expansion admixture in waterproof concrete;

Study on expansion admixture and steel fiber reinforcing high strength lightweight aggregate concrete;

Influences of expansion admixture on performance of self-compacting concrete;

Preparation and performance of a new expansion agent based on steel slag;

Preliminary approach to application of blast furnace slag as cement expansion agent;

Influence of superplasticizer on performance of sulfo-aluminate expansion agent under same fluidity;