不同细度稻壳灰对混凝土强度及自收缩的影响
发布时间：2018-08-13 12:46
【摘要】：研究4种细度的稻壳灰在5%~30%的掺量下对混凝土的强度和早期自收缩的影响.结果表明,混凝土的28d抗压强度与保证混凝土抗压强度比不小于100%的最大掺量均随稻壳灰的特征粒径D50的减小而增大;稻壳灰孔结构的吸水性可对混凝土的强度发展和早期自收缩产生影响,且D50越大影响越明显;D50在2.96~21.06μm时,稻壳灰可不同程度地抑制混凝土的早期自收缩,且其抑制程度随D50和掺量的增大而增大.
[Abstract]:The effect of four kinds of rice husk ash on the strength and early autogenous shrinkage of concrete was studied at the content of 5% and 30%. The results show that the maximum content of 28d compressive strength of concrete and the ratio of guaranteed concrete compressive strength is not less than 100% with the decrease of characteristic particle size D50 of rice husk ash. The water absorption of rice husk ash pore structure can affect the strength development and early autogenous shrinkage of concrete, and the greater the effect of D50 is, the more obvious is D50 at 2.96 ~ 21.06 渭 m, the rice husk ash can restrain the early autogenous shrinkage of concrete to some extent. The inhibition degree increases with the increase of D _ (50) and the content of D _ (2).
【作者单位】： 南京理工大学泰州科技学院土木工程学院;中建三局技术中心;
【分类号】：TU528
[Abstract]:The effect of four kinds of rice husk ash on the strength and early autogenous shrinkage of concrete was studied at the content of 5% and 30%. The results show that the maximum content of 28d compressive strength of concrete and the ratio of guaranteed concrete compressive strength is not less than 100% with the decrease of characteristic particle size D50 of rice husk ash. The water absorption of rice husk ash pore structure can affect the strength development and early autogenous shrinkage of concrete, and the greater the effect of D50 is, the more obvious is D50 at 2.96 ~ 21.06 渭 m, the rice husk ash can restrain the early autogenous shrinkage of concrete to some extent. The inhibition degree increases with the increase of D _ (50) and the content of D _ (2).
【作者单位】： 南京理工大学泰州科技学院土木工程学院;中建三局技术中心;
【分类号】：TU528
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