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New photo-thermal-synthesized polymer for self-compacting concrete to increase productivity, minimize pollution, and eliminate steam curing in precast concrete

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Journal of Harbin Institute of Technology(New Series) 2006年第5期13卷 518-524页

作者： F. C. Lai M. F. Mohd Zain 王宝民 K. C. Lee Dept. of Civil and Structural Engineering Faculty of Engineering Universiti Kebangsaan Malaysia 43600 U.K.M Bangi Selangor Darul Ehsan Malaysia Dept. of Civil Engineering Dalian University of Technology Dalian 116024 China Sime Darby Technology Petaling Jaya Kuala Lumpur Malaysia

The objective in this study is to apply the sustainable chemistry and photo-thermal synthesis technology to produce the sustainable eco-superplasticiser for the sustainable high performance SCC concrete especially in hot tropical countries. A photo-thermal synthesized eco-superplasticiser （PSES） was produced by using photo-thermal catalyst in a solar chemical reactor. In this preliminary study, an unique high early strength of SCC concrete has been successfully produced by imposing an unique proportion of the photo-thermal-synthesized eco- Superplasticiser （PSES）, local fly ash, sand and aggregate. The SCC concrete is preliminary tried in the precast concrete product to produce the complicated geometries as Tunnel segment, U-shape beam, and Box girder which have the critical reinforcement and thin section concrete. Surprisingly, this SCC provide the benefits as eliminating steaming energy, increased productivity, and minimize pollution. These unique properties of sustainable SCC concrete can not be achieved by the convention concrete by using ligno, naphthalene and melamine base superplasficiser. The synthesized sustainable eco-superplasticiser is a perfect choice to fully utilized the renewable energy and improve the concrete working environment.

关键词： photo-chemical synthesis sustainable self-compacting concrete eco-superplasticiser eliminate steaming renewable solar energy

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TEPCE SUPERPLASTICISER FOR SCC TO INCREASE PRODUCTIVITY,MINIMIZE POLLUTION,AND ELIMINATE STEAM CURING IN PRECAST & RMC concrete

TEPCE SUPERPLASTICISER FOR SCC TO INCREASE PRODUCTIVITY,MINI...

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第九届全国水泥和混凝土化学及应用技术会议

作者： F.C. Lai Technical Centre Sika Dalian, Dalian, China

High performance concrete (HPC) normally defined as high strength, high fluidity, high durability and etc. sustainable high performance concrete in general can be defined as HPC with the developments in the sense of environment pollution impact, utility of scarce good and energy, and fair in economic and social sense. High performance superplasticiser play a big role in the HPC and sustainable technology development due to its unique of the high dispersability, especially at extremely low W/C still can maintain the high workable stage. The objective in this study is to use Tailor made Eco-Polycarboxylic Ether (TEPCE) superplasticiser and evaluates the influences of its unique comb-type molecular structure against naphthalene base superplasticiser in the cement paste dispersability, water reduction, precast concrete and ready mix concrete (RMC) mix design. Besides, feasibility studies to incorporate the TEPCE superplasticiser for producing the sustainable high performance SCC concrete. In this preliminary study, a sustainable self-compacting concrete (SCC) grade 40, grade 60 and grade 80 has been successfully produced by imposing an unique proportion of the TEPCE Superplasticiser, local fly ash, slag, sand and aggregate. The SCC concrete is preliminary tried for the precast concrete product to produce the complicated geometries as Tunnel segment shape, which have the critical reinforcement and thin section concrete. For RMC mix design, a mix design SCC grade 40 by 43% fly ash replacement and a mix design SCC grade 80 by 49.4 % supplementary materials replacement for concrete filled tube (CFT) purpose were also evaluated for the ready mix concrete (RMC) industries. The quality of the mix for precast industries was determined by testing the slump flow over time and their strength cured at 22 0C and 32 0C are monitor for 12 hrs, 1 day, 3 day, 7 days, 14 days, 28 days and etc under the sealed-air cured basis. However, for RMC mix, the performance was evaluated in the sim

关键词： Tailor made superplasticizer sustainable self-compacting concrete Eco-superplasticiser Eliminate steaming Renewable energy

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