Experimental Investigation on Use of Wheat Straw Ash and Bentonite in Self-Compacting Cementitious System

被引：43

作者：

Khushnood, Rao Arsalan ^{[1
,2
]}

Rizwan, Syed Ali ^{[2
]}

Memon, Shazim Ali ^{[3
]}

Tulliani, Jean-Marc ^{[4
]}

Ferro, Giuseppe Andrea ^{[1
]}

机构：

[1] Politecn Torino, DISEG, I-10129 Turin, Italy

[2] Natl Univ Sci & Technol, NUST Inst Civil Engn NICE, Dept Struct Engn, Islamabad 44000, Pakistan

[3] COMSATS Inst Informat Technol, Dept Civil Engn, Abbottabad 22066, Pakistan

[4] Politecn Torino, Dipartimento Sci Appl & Tecnol DISAT, I-10129 Turin, Italy

来源：

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2014年 / 2014卷

关键词：

PAKISTANI BENTONITE; MORTARS; AGGREGATE;

D O I：

10.1155/2014/832508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this research, we evaluated the feasibility of wheat straw ash and bentonite (raw and heated at 150 degrees C for 8 hrs) as secondary raw materials in self-compacting paste (SCP). The fresh and hardened properties of SCP formulations including water and superplasticizer demand, flow behavior, compressive and flexural strength development, water absorption, and acid attack resistance were evaluated. Moreover, porosity, microstructural, and mineralogical investigations were also carried out on SCP formulations. Test results showed that the properties of SCP formulations in fresh state depend on the morphology of secondary rawmaterials. For heated bentonite and wheat straw ash formulations, the 28 days of compressive and flexural strength were higher or almost similar to reference SCP formulation. Among SCP formulations, wheat straw ash formulation was found to be more effective in consuming free lime and showed significant decrease in porosity with time, which in turn improved the resistance of this SCP formulation against water absorption and acid attack. Based on the test results, it can be concluded that the successful utilization of wheat straw ash and bentonite SCP formulations will offer durable and environmental friendly option to construction industry.

引用

页数：11

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