Sound Absorption of Pervious Concrete Containing Various Sizes of Coarse Aggregate

  • Chanchai Ngohpok หลักสูตรปรัชญาดุษฎีบัณฑิต สาขาวิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Vanchai Sata รองศาสตราจารย์ ศูนย์วิจัยและพัฒนาโครงสร้างมูลฐานอย่างยั่งยืน ภาควิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น
  • Prinya Chindaprasirt ศาสตราจารย์ ศูนย์วิจัยและพัฒนาโครงสร้างมูลฐานอย่างยั่งยืนภาควิชาวิศวกรรมโยธา คณะวิศวกรรมศาสตร์ มหาวิทยาลัยขอนแก่น และภาคีสมาชิก ราชบัณฑิตยสภาสนามเสือป่า เขตดุสิตกรุงเทพมหานคร
Keywords: Porous concrete, Water permeability, Cement paste

Abstract

Pervious concrete is a special type of concrete with high porosity and continuous void that allowsairorwater to passdirectly through. This paper presents the effect of aggregate sizes and paste contents (15, 20, and 25% by volume) on properties of previous concrete.Portland cement type I, crushed limestone with particle size ranges of 2.37-4.75, 4.75-9.53, 9.53-12.70, and 12.70-19.05 mm (No.8-No.4, No.4-3/8”, 3/8”-1/2” and1/2”-3/4”), water to cement ratio of 0.30, and superplasticizer type F were used in pervious concrete mixture. The results found that the densities, compressive strengths, and water permeability coefficients of pervious concrete were 1753-1936kg/m3, 103-168 kg/cm2, and 10-49 mm/sec, respectively. In addition, the high sound absorption of pervious concrete was found in low paste content mixture. The use of smallcoarse aggregate size gave better sound absorption than that of big aggregate size. These obtained results would lay a good direction for the future pervious concrete application.

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Published
2019-06-13
Section
บทความวิจัย