Abstract:With the understanding that there will be a great demand for superhigh performance concrete (SHPC) in the future construction engineering,while the resources of coarse and intermediate sand commony used for SHPC are scarce,so it is very important to replace coarse and intermediate sand by plentiful superfine one; First in China and abroad as well a superfine sand superhigh performance concrete with max. slump 255mm and max.28d compressive strength 126.8 MPa was prepared.It was compared with superhigh performance concrete with intermediate sand.

Abstract:In order to improve carbonation resistance of high_addition flyash concrete,the grinding of flyash and additon of hydrated_lime in flyash concrete have been studied.It is shown that it is possible to improve the carbonation resistance of high_addition flyash concrete by using these methods without reducing its strength.

Abstract:The pumpability of ready mixed concrete is a comprehensive property. At present there is no suitable method for its evaluation. The possibility of evaluating the pumpability of ready mixed concrete by a combincd index of the slump, the slump loss and bleeding under pressure is suggested.

Abstract:AAR expansion ratios of alkali_clinker_slag(ACS)cement mortars are studied by mortar bar test.The influences of the sort of alkalis and the content of clinker on AAR expansion ratio of ACS cement mortars are analysed.On the basis of above mentioned,the mechanism of AAR in ACS cement system is discussed.

Abstract:The compounding principle,methods and properties of concrete pumping admixture had been studied.An excellent pumping admixture was made up by use of FDN compounded with calcium ligno sulphonate,retarder for controlling slump loss and water retaining admixture for reducing water segregation rate.

Abstract:It is shown that the alkalinity of pore fluid of high addition flyash concrete decreases more greatly than that of normal concrete after 7 days,closing to the threshold value of 11.5.Having added 10%lime and 1.5%Na2SO4 in flyash concrete,the alkalinity increased evidently without reducing its strength.

Abstract:The durability of concrete is always a problem of great importance while the high performance concrete raise higher requirement for durability. The authors of this paper carried out a study on resistance to chemical attack of the high performance concrete prepared with Portland cement, silica fume and superplasticizer ,which has proved that the high performance concrete offers excellent resistance to chemical attack.

Abstract:The influences of autoclaving schedule on the compressive strength,bending strength,spliting strength and fracture energy are studied by testing the strengths,fracture energy,pore structure and BET surface of lime_sand concrete with 2 kinds of mix proportion and 8 autoclave schedules.The purpose of the work is to explain the changes of mechanical behaviors of lime_sand concrete by the data of pore structure and BET surface.

Abstract:Through thermal expansion coefficient determination and EPMA,this paper studied the suitability of the glaze for expanded pearlite compound glazed tile.The cause of crack formation of the glaze in the material was found.Corres ponding measures to improve the quality of the product were put forward.

Abstract:This paper studies the lime shape in the essential system of activated FA with water reducer.It shows that the water reducer has passive influence on activation of FA when lime is unslaked,and it will have positive influence when lime is slaked.A primary analysis has been done.

Abstract:A new type of wall materials, a block from desulphogypsum and flyash is prepared with desulph-ogypsum and flyash as solid wastes from power stations.This block presents excellent properties which can meet the requirements for non-loadbearing wall.lts binder proportion,production process,properties and economic benifits are studied and analyzed in thise paper.

Abstract:A fly ash brick is developed by using fly ash-lime-sulphate system as the binding material, added with certain quantities of aggregates and moulded by press, which can yield 28-day compressive strength up to 20 MPa under normal curing conditions. The factors affecting the strength of product are analyzed.

Abstract:Based on author's many experimental results, giving four items of key technique for preparing super high strength high performance concrete (SHPC); summarizing main benefits of SHPC; introducing briefly the current situation of application of SHPC;the problems of pumpability, brittleness and volume stability of SHPC are analyzed and discussed.

Abstract:This paper introduces raw materials,manufacture technology,properties and application in construction of natural anhydrite plastering material,its economic benifits were preliminary analyzed on basis of the results of pilot_production at plant.In China the resources of natural anhydrite are abundant and the new type of plastering material provided with high performance cost ratio should be widely spread.

Abstract:A new method is applied in this article to the quantitative phase analysis for weight factors of X-ray diffraction intensity. This method overcame the defect of traditional sampling and quantitative analysis method which only single out one plane web diffraction peaks for quantitative analysis from the phases of the sample to be tested. The method applied in this article is that the sample processing and taking measurements to the samples only once, then determining the weight factors by the intensity corresponding to n X-ray diffraction peaks from the phases of the sample to be tested. Thus we can get the relative percentage of each phase in the sample.

Abstract:对碱矿渣水泥基铬渣固化体侵出毒性的安全性进行了研究，结果表明，即使固化体在破坏的情况下，其浸出毒性仍在安全剂量范围内，固化体的早期表面浸出率为１０＾－３￣１０＾－４数量级，后期表面浸出率仅为１０＾－６数量级，与玻璃固化体的浸出率相当，可见固化体的长期抗表面浸出能力是很强的，完全可以用作建筑材料。

Abstract:This thesis introduces a repair technology in which a new developed adhesive was used to safely and quickly repair cracked waterpipes.To compare this new technology with traditional one,the results indicate that the new technology is an advanced one.

Abstract:This paper demonstrates the thermal analysis results and the characteristics of some silicate hydrates.It is intended to help the identification of phase compositions in the studies of silicate hydration.It shows that thermal analysis can be used as a useful tool in identification of hydrate phases.

Abstract:The selection of materials in building_design is explained by several actual examples and the relationship between materials and design is studied in this paper.

Abstract:The reasons of cracking of large mass concrete construction in the early age are analysed and the technical thinking and ways of prevention of cracking are presented in this paper.UEA micro_expanding agent was used in the construction of the World Trade Centre of chongqing.The early contraction of corcrete is changed into limited expansion.the practical engineering experience is obtained in efficiently perventing the early cracking of concrete and ensuring the strength of concrete.

Abstract:大体积混凝土的裂缝，主要是由施工阶段混凝土温度变形而引起的，尤其对一次性浇注厚层结构的大体积混凝土，减少温度变形更为重要．针对重庆大佛寺长江大桥在选用适当的水泥和配比以及施工方法的前提下成功地一次性浇注关键路线———４＃墩承台。

Abstract:作者曾在世界著名的英国ＯｖｅＡｒｕｐ工程顾问公司任职高级工程师。期间，曾主持了数项香港著名工程的Ｃ６０－Ｃ１００高强混凝土材料的设计工作。本文系在此经验的基础上整理而成。文章论述了高强混凝土在工程应用中可能出现的问题以及针对这些问题所采取的措施和现场测试结果，并阐述了材料规范，以期在材料设计和施工中将这些问题防患于未然。