高贝利特高性能混凝土之浅议(二)

(接上期 )3.3　抗压强度关于龄期与强度的关系 ,普通波特兰水泥受水灰比的影响较小 ,龄期 7ｄ强度达到 70 %左右 ,2 8ｄ达到 90 %左右 ,各龄期的强度增进率大体一致 ;高贝利特水泥则是Ｃ2 Ｓ量越多、水灰比越大 ,其强度增进越慢 ,只有当水灰比Ｗ /Ｃ <0 .2 5时 ,各龄期的强度增进率才变好。研究发现 ,水灰比Ｗ /Ｃ=0 .35～ 0 .4 5的场合 ,在龄期到达 2 8ｄ之前 ,随着Ｃ2 Ｓ量的增加 ,其抗压强度降低 ;但龄期到达 91ｄ时 ,抗压强度已与Ｃ2 Ｓ量无关 ,与普通波特兰水泥相同。水灰比Ｗ /Ｃ =0 .2 0、Ｗ /Ｃ =0 .2 5的场合 ,短龄期的抗压强度随…

Simple Explanation about High Belite High Derformance Concrete (HPC)(Part Ⅱ)

There is a simple introduction to the research and development of the high belite HPC and its present situation home and abroad.The present study shows that high belite HPC has good workability, durability and physicomechanical properties,and among them, its durability is worth the particular notice.And the high belite HPC can save resources and energy so as to be able to be in line with the direction of the sustainable development.The high belite HPC has several favorable and incomparable performances that the common concrete has not yet had and so it is reasonable that it should become an inevitable developing direction of concrete of this century.