ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Influence of Fineness of Cement Produced from Industrial Wastes on Strength of Mortar)

ผู้เขียน:ดร.ศุภกิจ นนทนานันท์, รองศาสตราจารย์, Naphol Yoobanpot, นางดวงฤดี ฉายสุวรรณ, รองศาสตราจารย์

สื่อสิ่งพิมพ์:pdf

Abstract

The effect of the fineness of cement produced from waste-based clinker on mortar strength was studied. Combinations of wastes—namely, ark shell, waste limestone powder and water supply sludge—with the addition of hydrated lime were prepared with an appropriate mix proportion for the clinkerization process to produce cementitious material. Clinkers were ground in order to obtain a target fineness ranging from 2,000 to 3,500 cm2/g and then blended with 5% gypsum by weight to produce a waste-based cement similar to an Ordinary Portland Cement type I (OPC). The chemical and physical properties of the waste-based cement were investigated and compared with those of OPC. The results revealed that the mortar strengths of the waste-based cement increased with curing time but were relatively lower than those of OPC. Cracking and swelling could be observed in mortars produced from wastebased cement having relatively low fineness. The negative effects could be eliminated when cement fineness was increased, resulting in markedly increased strengths. Expansion behavior due to the reaction of free lime and the formation of ettringite in cement pastes was observed and its implications discussed.

Article Info

Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 045, Issue 4, Jul 11 - Aug 11, Page 762 - 772 |  PDF |  Page