掺合大同偏高岭石制备高性能混凝土的研究

Preparation of High Performance Concrete with Datong Metakaolinite

大同石炭二迭系煤层夹矸,经控温煅烧的偏高岭石具有良好的水化活性。将一定比例的大同偏高岭石粉掺合到水泥中,能显著改善混凝土的力学特性,极大地提高混凝土的密实度和机械强度,使混凝土有良好的工作性能。对比试验发现600℃低温煅烧的大同偏高岭石粉作为水泥掺合料制得混凝土的抗压强度,超过了掺合其他温度煅烧的偏高岭石的抗压强度,掺合20%～30%的600℃煅烧的大同偏高岭石到水泥中,制备的混凝土试样抗压强度表现出优良的机械性能。该研究为大同煤矸石制备高性能混凝土利用提供了科学依据。

Datong metakaolin has good hydration activity after calcination.To put some Datong metakaolinite into concrete will promote the mechanical quality of concrete,greatly increase its density,strength and working performance.The results of the comparative experiment show that the strenghth of concrete mixed with Datong metakaolinite which has been calcined at 600℃ higher than other temperatures.Blending 20%-30% Datong metakaolinite which has been calcined at 600°C can produce concrete with good mechanical quality.This study provide scientific reference for Preparation of high performance concrete with Datong coal gangue.