水泥混凝土制品_2019_《混凝土與水泥制品》雜志社

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水泥混凝土制品

蒸壓無石棉纖維水泥板鼓泡分層現象原因及解決措施

徐定豐

２０19年第12期

摘要

引用本文

摘要：結合實際生產，分析了蒸壓無石棉纖維水泥板生產過程中鼓泡分層現象的原因，并結合實際生產，從提高坯料黏結力（優化原材料加工處理、回水回料控制、外加劑的應用、板材的壓制工藝、優化預養、蒸養制度等）和優化養護制度出發，提出了相應的解決措施，以期為蒸壓無石棉纖維水泥板的生產提供參考借鑒。 Abstract: Based on the actual production, the causes of the bubble and layering phenomenon in the production process of autoclaved asbestos-free fiber cement board were analyzed, and in combination with the actual production, in order to improve the bonding strength of the blank (optimize the processing and treatment of raw materials, return water and return material) Control, application of additives, pressing process, optimization of pre curing, steam curing system, etc.) and optimization of curing system, the corresponding solutions are put forward in order to provide a reference for the production of steam pressed asbestos-free fiber cement board.

徐定豐.蒸壓無石棉纖維水泥板鼓泡分層現象原因及解決措施[J].混凝土與水泥制品,2019(12):38-42. XU D F.Causes and Solutions of the Bubbling and Delamination in Autoclaved Asbestos-Free Fiber Cement Board[J].China Concrete and Cement Products,2019(12):38-42.

預制混凝土箱涵結構設計理論與施工技術研究綜述

何建平，蔡玉軍，孫建龍

２０19年第12期

摘要

引用本文

摘要：結合預制混凝土箱涵的設計理論和施工方法，深入分析了現有預制混凝土箱涵結構力學簡化計算方法、有限元數值模擬分析方法。系統論述了現澆法、直接頂進工法和管幕-箱涵法的研究概況、進展及其優勢進行了系統地論述與總結。并在此基礎上，提出了研究中存在的關鍵技術和具體問題，探討了預制混凝土箱涵結構的發展前景及趨勢。 Abstract: According to the design theory and construction method of underground precast concrete box culvert, two structural calculation methods, simplified calculation of structural mechanics and finite element numerical simulation, and several kinds of construction methods of box culvert are discussed, including cast-in-place method, jacking method and pipe-curtain-box culvert method et al. Combined with existing research, the research status and hot spots at home and abroad are analyzed systematically, summary have also been given in this paper. On this basis, some problems existing in the research are put forward, and the development prospect of underground box culvert is forecasted.

何建平,蔡玉軍,孫建龍.預制混凝土箱涵結構設計理論與施工技術研究綜述[J].混凝土與水泥制品,2019(12):33-37+42. HE J P,CAI Y J,SUN J L.Summary of the Research on Design Theory and Construction Technology of Precast Concrete Box Culvert Structure[J].China Concrete and Cement Products,2019(12):33-37+42.

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