Cal Polymers公司在其Calthane ND的聚合物系列中增加了浇铸型弹性体品种。公司宣称，加入TDI、MOCA的该体系即使在环境温度时，其固化时间足够快而可用于喷涂。该体系能生产从邵A硬度为0到邵D硬度为80硬度范围的弹性体，且透光性好、...Cal Polymers公司在其Calthane ND的聚合物系列中增加了浇铸型弹性体品种。公司宣称，加入TDI、MOCA的该体系即使在环境温度时，其固化时间足够快而可用于喷涂。该体系能生产从邵A硬度为0到邵D硬度为80硬度范围的弹性体，且透光性好、可着色，还防碎抗脆。该产品还具有显著的耐低温性能，最低可至-150℃。展开更多
This paper concentrates on the research of plaster-bonded moulding matertal with coal mine waste as its major filler and its process. Having made a careful investigation of various factorsaffecting properties of the m...This paper concentrates on the research of plaster-bonded moulding matertal with coal mine waste as its major filler and its process. Having made a careful investigation of various factorsaffecting properties of the moulding material, the authors optimize several new formulations of thismaterial and the prarees which are inexpensive, convenient in application, precise in bokling sizoof moulds.展开更多
This paper discusses the technique of casting concrete ofmicropiles with pressures and the consequence of comparisons with normal way of casting concrete （casting with gravity）. Preliminary geotechnical studies have...This paper discusses the technique of casting concrete ofmicropiles with pressures and the consequence of comparisons with normal way of casting concrete （casting with gravity）. Preliminary geotechnical studies have been made in specific area in Sudan to predict the soil parameters and then an experimental work has been done for an estimated number ofmicropiles with different diameters and different techniques of placing concrete with various amount of pressure. This study was carried out to learn the usefulness of this technique in the field of structural foundations in Sudan. Capacities of micropiles were compared in cases of non-pressure casting （normal way of casting concrete） and pressure casting. Through the results, it was found that the entry of pressure factor in the operation of casting concrete increases the capacities of micropiles. The increased value of ultimate load depends on the amount of pressure applied.展开更多
文摘This paper concentrates on the research of plaster-bonded moulding matertal with coal mine waste as its major filler and its process. Having made a careful investigation of various factorsaffecting properties of the moulding material, the authors optimize several new formulations of thismaterial and the prarees which are inexpensive, convenient in application, precise in bokling sizoof moulds.
文摘This paper discusses the technique of casting concrete ofmicropiles with pressures and the consequence of comparisons with normal way of casting concrete （casting with gravity）. Preliminary geotechnical studies have been made in specific area in Sudan to predict the soil parameters and then an experimental work has been done for an estimated number ofmicropiles with different diameters and different techniques of placing concrete with various amount of pressure. This study was carried out to learn the usefulness of this technique in the field of structural foundations in Sudan. Capacities of micropiles were compared in cases of non-pressure casting （normal way of casting concrete） and pressure casting. Through the results, it was found that the entry of pressure factor in the operation of casting concrete increases the capacities of micropiles. The increased value of ultimate load depends on the amount of pressure applied.
