常溫合成泛用型高保塑羧酸強塑劑之開發研究

• Main Authors: Yen-Chieh Huang, 黃彥傑
• Other Authors: Kai-Lin Hsu
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/86152186933802758229

碩士 === 國立高雄第一科技大學 === 營建工程研究所 === 104 === The construction of the buildings are particular about time and efficiency, preparation of concrete can formed high performance concrete with good property of the work, by adding the appropriate plasticizer, to increase the quality and efficiency during the construction. The present commercially available plasticizer prices are mostly quite expensive, the synthesis process is also at higher temperature polymerization, not only the high energy consumption, burden to the environment and equipment, but also the dope of liquid plasticizer mostly imported, and then diluted during the domestic sell, market prices vulnerable to price fluctuations in the foreign liquid dope, and therefore the cost increase. This study developed the type of ordinary-temperature high maintain plasticity polycarboxylate plasticizer, whose molecular and moles design is based on understanding among materials response mechanisms to preliminary tests strong superplasticizers, fluidity test diffusivity and fluidity kept. Preparation of polycarboxylic acid superplasticizer by using different kinds of macromers (HPEG、TPEG、T+H(2:1)) and different reaction temperature (30℃、32℃、35℃) as synthesis factors, test its physical properties (pH value, solids content, specific gravity) basis on specification, then compare with commercial superplasticizer performance and adapt compatibility by using different ambient temperatures (23℃, 27℃, 32℃) and different brands cement ( Taiwan, Jin Yu, Asia). Discuss how different macromers, reaction temperature and ambient temperatures effects superplasticizer’s performance, through infrared spectroscopy (FT-IR) and ultraviolet spectroscopy(UV) test to analyze the functional group and the type of superplasticizer. The experimental results showed that: the superplasticizer synthesis with TPEG at reaction temperature 32℃, the fluidity of cement paste tests had maximum expansion; the superplasticizer synthesis with TPEG mix HPEG=2:1 at reaction temperature 32℃, the fluidity of cement paste tests had highest maintain plasticity characteristic, at 120 minutes fluidity loss less than 10%. By comparison, the fluidity expansion and maintain plasticity characteristic in this study are better than commercial superplasticizer.