Engineering Properties of White Carbon Sludge-blended Cement Mortar

• Main Authors: Lin Yu-Hsien, 林育賢
• Other Authors: 李增欽
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/c8qp57

碩士 === 國立聯合大學 === 土木與防災工程學系碩士班 === 101 === The purpose of this study is to explore the possibility of using White Carbon Sludge (WCS) sludge, a by-product from the manufacturing rubber of chemical industry, to replace partial cement in cement-paste, cement-mortar. The emphases are on its material strength and engineering properties. WCS sludge is rich in hazardous nano-particles of SiO2 and other debris of unknown organics. These hazardous ingredients may harmful to the ecological environment, and the WCS sludge may be a pozzlanic material suitable recycling in cement concrete, which worth to investigate. WCS sludge were firstly conducted for XRD analysis and SEM/EDS analysis, the test result demonstrate that the WCS sludge were pozzolanic material, then we adopted the water/cementitious ratio of 0.485 and 0.55, and used 2.5, 5.0, 10.0, and 15.0 % cement replacement to mold the WCS sludge-blended cement mortar (SBCM; experiment group) specimen and ordinary Portland cement mortar (OPCM; control group) specimen are also to be made for comparisons, which are compressive strength test, and mass growth measurement. That test results reveal that the compressive strength of SBCM specimens were comparable to the OPCM specimens by the water/cementitious ratio of 0.485. The compressive strength of SBCM specimens were higher than OPCM specimens about 10~42% by the W/C ratio of 0.55, but their flow values were quickly decrese with the cement replacement ratio increase. For the purpose of practical engineering, which need the good workability . So the experiment try to add the Type G superplastisizer, and we use the Taguchi Method of L9(34). The cement, white carbon sludge, superplasticsizer, and W/C ratios were selected for the control factor, the compressive strength test of 9 samples of SBCM and OPCM specimen were be conducted. The test results reveal that the strength of samples A3B3C2D1 were 154% of OPCM specimens. The reconfirmation test also reveals the good results. Those tests results reveals that the feasibility of reuse WCS sludge in practical engineering. The goal of this study is to transform the waste materials of WCS sludge into a useful resource to eliminate its disposal problems and appeal to the sustainable development of earth.