第五期_2010_《混凝土與水泥制品》雜志社

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第五期

加氣混凝土砌塊掰板機的設計

劉紹莊

２０10年第5期

摘要

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摘要：分析了國內掰板機的現狀和存在的問題，介紹了6×1.5 m掰板機的設計及特點，性能，結構、夾坯液壓系統及工作原理。 Abstract: The current situation and the problems of glass severing machine are analyzed. And the design、characteristics 、performances 、structure、hydraulic system and working principle of glass severing machine with the size of 6×1.5 m are introduced.

CFRP加固部分預應力混凝土梁的正截面應力和應變分析

萬軍

2010年第5期

摘要

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摘要：基于“預加力使混凝土成為彈性材料”的概念，并運用“有效慣性矩法”和力的平衡方法對碳纖維布加固部分預應力梁跨中正截面進行了應力、應變分析，給出了截面開裂彎矩和開裂截面幾何特性，為碳纖維布加固部分預應力梁的研究提供了理論基礎。 Abstract: According to the concept of "prestressed tendons turning concrete into elastic material", the stress and strain of the cross-section of the partially prestressed beam reinforced by CFRPs with the use of "effective inertial moment method" and the balance method of force are analyzed. And the geometrical characterestics of cracking moment and cracking section are proposed, which provide the theoretic basis of the research on the partially prestressed beam reinforced by CFRPs.

再生粗骨料混凝土梁短期荷載作用下的剛度修正

白文輝，馮麗

２０10年第5期

摘要

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蒸壓加氣混凝土砌塊應用經濟性分析

張艷，龔希武，段瑋瑋

２０10年第5期

摘要

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摘要：蒸壓加氣混凝土砌塊作為一種新型建筑材料，在建筑中應用的程度和功能發揮迄今遠未達到應有的水平。結合在舟山地區的應用情況，對其經濟性進行了分析，證明蒸壓加氣混凝土砌塊的使用可以使制造成本、運輸費用、建筑能耗、使用耗材、建筑用地等得到不同程度的節約。為蒸壓加氣混凝土砌塊在夏熱冬冷地區的推廣應用提供了依據。 Abstract: As a new type of building material，autoclaved aerated concrete blocks have not reached the required level of the application and function in construction.Combining with the application in Zhou Shan district, the economy of autoclaved aerated concrete blocks is analyzed, which proves that using autoclaved aerated concrete blocks will save money at various degree, such as the manufacturing costs，transportation costs，building energy consumption, using consumables and building sites. It will provide the basis for the widely use of autoclaved aerated concrete blocks in hot summer and cold winter climate zone.

爐底渣在預拌砌筑砂漿中的應用研究

李敏1，潘鋼華2，張菁燕2，郭峰3

２０10年第5期

摘要

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摘要：爐底渣的活性低，在預拌砂漿中使用會產生一系列的問題，如需水量大，收縮大，強度低等。本文在對爐底渣各項性能進行分析的基礎上，對爐底渣體積摻量15%和30%的砌筑砂漿進行了實驗研究，通過將爐底渣的小部分極細顆粒替代膠凝材料，其余替代中砂，得到了各項性能都滿足標準要求的M7.5級爐底渣砌筑砂漿配方。 Abstract: Because of its low activity, the use of bottom slag in ready-mixed mortar can cause a series of problems, such as more water demand, large shrinkage and low intensity. Based on the full analysis of the performances of bottom slag, the properties of masonry mortar with the volume content of 15% and 30% of bottom slag are studied. Through replacing some cementitious material with a small part of fine particles of bottom slag, and the others replacing the medium sand, the formula of M7.5 masonry mortar with bottom slag are gotten, whose performances can meet the requirments of the standards.

纖維材料在固井領域中應用的嘗試

張峰，謝衛紅，鐘新輝

２０10年第5期

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摘要：針對油井水泥石固有的極限應變小，抗沖擊性能差等特點，嘗試將纖維材料摻入到油井水泥漿中，以改善水泥石的力學性能。室內試驗表明，由幾種纖維混合后得到的一種合成纖維（代號FR）材料能夠顯著提高水泥石試樣的力學性能，使水泥石試件的抗折強度提高10.26％~24.27%，壓縮彈模下降9.09％~21.62%，抗沖擊功增長7.39％~34.57%。 Abstract：According to the characteristics of inherent low ultimate strain and poor impact resistance of oil-well cement, fibre materials are tried to put into the oil-well cement slurry, which can improve mechanical properties of cementitious materials. Laboratory tests indicate that a kind of synthetic fibre material (FR) can observably improve mechanical properties of cementitious samples, which makes the flexural strength of samples increase about 10.26% to 24.27%, elastic modulus of compressibility decrease about 9.09% to 21.62% and impact resistance increase about 7.39% to 34.57%.

滌綸纖維砂漿早期抗裂性研究

金寶宏，李歡，杜強

２０10年第5期

摘要

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摘??要：通過試驗對滌綸的耐堿性及抗裂性進行了探索。結果表明，滌綸纖維具備一定的耐堿性，適用于混凝土的堿環境，滌綸對砂漿早期裂縫的控制較為明顯，裂縫名義總面積平均減低了40%。Abstract：Throughthetests,thealkaliresistanceandcrackresistanceofpolyesterareresearched.Theresultsindicatethatthepolyesterfiberhasacertainalkaliresistance,anditisfitforthealkalineenvironmentofconcrete.Theearlycrackcontrolofpolyesterformortarisobvious,andthetotalnominalcrackareaisreducedbyanaverageof40%.

碳纖維智能混凝土的溫敏性探討

張珂峰，夏正兵

２０10年第5期

摘要

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摘??要：碳纖維混凝土（SCFC）是在普通混凝土中摻入碳纖維而成的一種復合材料，短切碳纖維混凝土正越來越多地應用于需要冬季除冰的道路和機場路面。通過試驗，對SCFC的溫敏性進行了初步的探討和研究。Abstract：Akindofcompositematerialwithaddingcarbonfiberintonormalconcretesiscalledcarbonfiberreinforcedconcrete(CFRP).Short-cutCFRPismoreandmoreappliedto?pavementneedingdeicinginwinterandairportsurfaceroute.Throughthetest,preliminarydiscussionandresearchoftemperaturesensitivityofCFRPiscarriedout.

膨脹劑對噴射補償收縮鋼纖維混凝土力學性能的影響

崔朋勃，馬芹永

2010年第5期

摘要

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摘要：對鋼纖維和不同膨脹劑摻量下的噴射補償收縮鋼纖維混凝土抗壓強度和劈裂抗拉強度進行了試驗研究。結果表明，隨著膨脹劑摻量的增加，鋼纖維對噴射補償收縮鋼纖維混凝土的增強作用越明顯，但膨脹劑摻量超過一定限度會明顯降低這種增強作用，鋼纖維體積率摻量為0和1.2%的噴射補償收縮鋼纖維混凝土中，膨脹劑的最佳匹配摻量分別為6%和8%。 Abstract： Compressive strength and splitting tensile strength of the shrinkage-compensating steel fiber reinforced shotcrete with steel fiber and different dosages of expansive agents are studied. The results show that, with the dosage of expansive agents increaseing, the reinforcement effect of the steel fiber on the shrinkage-compensating steel fiber reinforced shotcrete becomes more obvious, but this reinforcement effect will be significantly reduced when the dosage of expansive agents beyonds a certain limit. With the steel fiber volume content of 0 and 1.2% for shrinkage-compensating steel fiber reinforced shotcrete, the best match dosages of expansive agents are 6% and 8%.

碳纖維增強復合材料約束混凝土的溫度應力分析

劉華新1，谷志民2，畢重1，王學志1

２０10年第5期

摘要

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摘要：混凝土與碳纖維的熱膨脹系數不同，在溫差作用下，兩種材料各自的自由變形受到約束，從而產生了溫度應力。通常，溫度應力隨著溫差增大而增大。應用ANSYS軟件分別對降溫溫差30℃、40℃、50℃、60℃時碳纖維布約束混凝土的溫度應力進行了分析，以期對寒冷地區用碳纖維增強復合材料加固混凝土結構時，對溫度應力的控制有所幫助。 Abstract：Because the thermal expansion coefficient is different between CFRP and concrete，temperature stress is produced when the free form deformations of two kinds of materials are confined under the temperature difference. Usually, temperature stress increases when the temperature difference increases. By the ANSYS software, under the cooling temperature difference of 30℃, 40℃, 50℃ and 60℃, the temperature stress of reinforced concrete columns confined with CFRPs is analyzed . The purpose is that it can be helpful to the control of temperature stresses of reinforced concrete columns confined with CFRPs in cold areas.

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