Influence of Aggregate Coated with Modified Sulfur on the Properties of Cement Concrete

Materials

Swoo-Heon Lee²  Ki-Nam Hong¹  Jae-Kyu Park¹ 

[1] School of Civil Engineering, Chungbuk National University, Chungbuk 361-763, Korea; E-Mail:;Department of Civil Engineering, University of Texas at Arlington, Arlington, TX 76019, USA; E-Mail:

关键词: modified sulfur;    coated aggregate;    durability;    strength;    freezing-thawing;    acid resistance;   

DOI  :  10.3390/ma7064739

来源: mdpi

【 摘 要 】

This paper proposes the mixing design of concrete having modified sulfur-coated aggregate (MSCA) to enhance the durability of Portland cement concrete. The mechanical properties and durability of the proposed MSCA concrete were evaluated experimentally. Melting-modified sulfur was mixed with aggregate in order to coat the aggregate surface at a speed of 20 rpm for 120 s. The MSCA with modified sulfur corresponding to 5% of the cement weight did not significantly affect the flexural strength in a prism concrete beam specimen, regardless of the water-cement ratio (W/C). However, a dosage of more than 7.5% decreased the flexural strength. On the other hand, the MSCA considerably improved the resistance to the sulfuric acid and the freezing-thawing, regardless of the sulfur dosage in the MSCA. The coating modified sulfur of 5% dosage consequently led to good results for the mechanical properties and durability of MSCA concrete.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.