Effect of Quartz Particle Size and Cement Replacement on Portland Limestone Cement Properties  

作　　者：Kachallah Bukar Gubio Muhammad Mukhtar Ismail Olubajo Olumide Olu 

机构地区：[1]Chemical Engineering Department,Abubakar Tafawa Balewa University,Bauchi,Bauchi State,740102,Nigeria

出　　处：《Journal of Building Material Science》2022年第2期16-25,共10页建筑材料科学（英文）

摘　　要：This research focuses on investigating the effect of quartz particle size and cement replacement on their physicomechnical properties.Portland limestone cement(PLC)was employed and replaced with quartz powder(QP)at various particle sizes(1.19 mm,425μm,300μm,212μm,<212μm)and cement replacement between 2.5 wt.%~15 wt.%at interval of 2.5 wt.%to study their impact on the cement properties.The PLC chem­ical composition revealed a relatively low lime and high silica content compared to the conventional cement.QP revealed a high silica,lime and sulphur contents compared to natural sand.A high consistence,elongated setting times and lower strengths and specific gravities were observed as cement was replaced with QP at a given particle size respectively.The effect of replacing cement with QP content between 2.5 wt.%and 15 wt.%at various particle sizes resulted in average increments by 45.32%,23.13%and 36.06%for initial setting time,final setting time and water demand respectively.This increase could be related with clinker diminution cou­pled with enhanced QP surface area and clinker diminution.Similarly,an increase in the QP surface area at a given cement replacement led to higher water consistence,retarded setting times and lower strength.The effect of enhancing the QP’surface area between 1.19 mm and below 212μm at a given cement replacement resulted in average increments by 26.27%,8.61%and 7.49%for initial and final setting times and water demand respectively.The strength gain of the QP cement blend diminished significantly above 30%up to 15 wt.%cement replacement especially beyond 3 days.The low strength could be due to the high-water consistence linked with silica con­tent resulting in setting time retardation.The optimal QP content was deter­mined at 5 wt.%owing to the fact that the physicomechnical properties did not significantly deviate from the properties of control.

关 键 词：Quartz powder Particle size CONSISTENCE Setting times Mortar compressive strength 

分 类 号：TQ1[化学工程]