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首页> 外文会议>第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC'2009-China) >EXPERIENCES WITH SCC TO INCREASE THE PRODUCTIVITY AND APPLICATIONS OF PREFABRICATED ELEMENTS IN MEXICO
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EXPERIENCES WITH SCC TO INCREASE THE PRODUCTIVITY AND APPLICATIONS OF PREFABRICATED ELEMENTS IN MEXICO

机译：SCC提高墨西哥预制元素的生产率和应用的经验

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摘要

Currently, the precast/prefabricated industry in Mexico requires to make changes on its traditional production process; so it needs concretes that help to enable faster placement with out vibration, to eliminate steam curing and operations of finishing with the required quality warranty and to get an efficient process to increase the productivity.SCC is a viable option to get theses changes using it as substitution of conventional or normal concrete. Some kind of prefabricated elements as precast,/prestressed or postensioning member of structural type require a compressive strength at 28 days since 34.32 Mpa to 44.13 Mpa or more depending on member type. The SCC technology used is optimized to get eighty per cent of compressive strength at different hours; for example 12, 14, 16 hours with stability and flowability according to the application.This study focuses on the different applications of SCC in Mexico as I-beams, right beam,double Tee beams, columns, case beams, AASHTO beams. The use of SCC gives a significant benefit to prefabricated producers due to cost reduction, finishing, labor reduction and increment in the productivity. With optimal designs of SCC, the technical and economics advantages and benefits are maximized. Aesthetic and environmental benefits include to improve the appearance of exposed surfaces and noise reduction. A benefit-cost analysis of two type members and the reduction of CO2 by leaving off using steam generators are shown.
机译：目前，墨西哥的预制/预制行业需要对其传统生产工艺进行更改；因此，它需要混凝土来帮助更快地放置而不会产生振动，消除蒸汽固化和具有所需质量保证的精加工操作，并获得一种有效的过程来提高生产率.SCC是一种可行的选择，可以将其用作这些更改替代常规或普通混凝土。自34.32 Mpa到44.13 Mpa或更高，取决于构件类型，某些预制构件作为结构类型的预制，/预应力或后张构件需要28天的抗压强度。对所使用的SCC技术进行了优化，以在不同的时间获得80％的抗压强度；例如，在12、14、16小时内具有根据应用场合的稳定性和流动性。本研究着重于墨西哥SCC的不同应用，如工字梁，右梁，双T形梁，柱，箱形梁，AASHTO梁。由于降低了成本，减少了精加工，减少了劳动力并提高了生产率，因此使用SCC可为预制生产商带来重大收益。通过SCC的优化设计，可以最大程度地提高技术和经济优势。美学和环境效益包括改善裸露表面的外观和降低噪音。显示了两种类型成员的效益成本分析，以及通过使用蒸汽发生器排出而减少了二氧化碳的排放。

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