第四期_2010_《混凝土與水泥制品》雜志社

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第四期

常溫與蒸壓條件下陶瓷拋光磚粉的反應活性及其應用研究

鐘明峰，張志杰，王功勛

２０10年第4期

摘要

引用本文

摘??要：采用IR、XRD、SEM以及EDS等方法研究了陶瓷拋光磚粉常溫與蒸壓條件下的反應活性。研究結果表明：拋光磚粉的水泥膠砂強度活性指數為83%，具有較高的反應活性，但其含有一定量的氯離子及較高的需水量，限制了作為水泥混合材的使用。陶瓷拋光磚粉在蒸壓條件下具有更高的反應活性，石灰－拋光磚粉蒸壓制品生成Ca/Si為1.58的水化產物，且所制備的蒸壓制品強度較高。因此陶瓷拋光磚粉作為硅酸鹽蒸壓制品的主要原料，在新型墻體材料工業可得到大量的應用，不僅可節約資源，減少環境負荷，且對陶瓷工業的可持續發展具有重要的現實意義。Abstract:HydrationabilityofceramicpolishingbrickpowderundernormaltemperatureandautocalvedconditionisstudiedbyIR,XRD,SEMandEDS.Theresultsindicatethattheactivityindexofcementsandstrengthofpolishingbrickpowderis83%,whichmeansthatpolishingbrickpowderhadhighhydrationability,butthereisthelimitationwhenitisusedascementadmixturebecauseofcontainingchlorideionandhighwaterrequirement.Autoclavedconditionisbeneficialtoinspirehydrationabilityforceramicpolishingbrickpowderandcalcium-ceramicpolishingbrickpowderproductsareconvertedintohydrationproducts,whoseratioofCa/Siis1.58,andthestrengthofautoclavedproductsishigher.Therefore,asceramicpolishingbrickpowdertobethemainmaterialofautoclavedsilicateproducts,itcanbewidelyappliedtonewwallingmaterialsindustry,whichcannotonlysaveresourcesandreducetheenvironmentalloading,butalsohasthegreatsignificanceforsustainabledevelopmentofceramicindustry.

尾礦砂生產蒸壓加氣混凝土砌塊的試驗研究

謝紅波，林克輝，李向濤

２０10年第4期

摘要

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摘??要：探索了用硫鐵礦選礦尾砂生產蒸壓加氣混凝土砌塊的可行性，得出了尾礦砂生產蒸壓加氣混凝土砌塊的最佳配比和最佳蒸養制度。所制的的尾礦砂蒸壓加氣混凝土制品平均密度為716kg/m3，平均抗壓強度為5.20MPa，符合標準GB/T11968-2006中A5.0、B07級蒸壓加氣混凝土砌塊的要求。Abstract:Thefeasibilityofproducingautoclavedaeratedconcretebrocksusingtailingofpyritesisdiscussed.Theoptimalproportionandtheoptimalautoclavedcuringsystemofautoclavedaeratedconcretebrockswithtailinghavebeenfound.Thepreparedtailingautoclavedaeratedconcreteproductshavetheaveragedensityof716kg/m3andaveragecompressivestrengthof5.20MPa,whichmeettherequirementofA5.0andB07autoclavedaeratedconcretebrocksintheGB/T11968-2006standard.

預應力砌塊砌體預應力損失的試驗研究與分析

郭樟根，孫偉民，彭陽

２０10年第4期

摘要

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摘要：和預應力鋼筋混凝土一樣，預應力砌體也會發生預應力損失。因此，確定各個階段的預應力損失值是進行預應力砌體結構設計的基礎。通過試驗研究了預應力砌塊砌體的預應力損失隨時間的變化規律，測試了各個階段以及最終的預應力損失量。結果表明，預應力砌塊砌體的預應力損失值不大，且前期發展較快。詳細分析了預應力砌塊砌體結構中預應力損失的各個組成部分，研究了預應力損失各個組成部分的大小和發展階段。在此基礎上，提出了預應力砌塊砌體預應力損失的計算公式和總損失值。 Abstract: There is prestressed loss in prestressed masonry just like prestressed reinforced concrete. Determining prestressed loss value in each phase is the base of structure design of prestressed masonry. The variation law of the prestressed loss of prestressed block and masonry by time is studied through experiment, and the prestressed loss in each and final phase is tested. The results indicate that the prestressed loss value of prestressed block and masonry is small, and it develops quickly in early stage. Each component of prestressed loss in prestressed block and masonry structure is analyzed, and the value and development phase of each component of prestressed loss is researched. On this base, calculation formula of prestressed loss of prestressed block and masonry and total loss value is proposed.

鋼筋混凝土梁碳纖維布加固研究

謝衛紅，辛家寶，董昊，張峰

２０10年第4期

摘要

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摘要：通過力法原理對碳纖維布加固混凝土梁的機理進行了探討，結果表明鋼筋混凝土梁在外貼碳纖維布加固鋼筋混凝土結構時，改善了結構的受力狀態，提高了結構的整體剛度和原有結構的承載能力；分析了爆炸荷載作用下鋼筋混凝土構件的破壞形態和影響因素，得出了鋼筋混凝土梁抗爆加固的措施。 Abstract:The mechanical principle of the strengthened RC beams with CFRPs are discussed by the principle of force method. The results show that sticking CFRPs to strengthen the RC structure can improve the RC structure performance under loading and upgrade the total stiffness and the load-bearing strength of the RC structure. The failure mode and influencing factors of RC beams under blast loading are analyzed. And the antiknock and strengthening methods of RC beams are obtained.

混凝土裂縫的表面處理方法對防水性能的影響

黃蓓，吳淼，錢春香

２０10年第4期

摘要

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摘要：研究了水泥基材料裂縫經防水卷材，防水涂料，水泥基滲透結晶處理后的短期、長期防水效果，并對其在凍融循環及干濕交替下的防水耐久性進行了分析比較。試驗結果表明，防水卷材適用于迎水面處理裂縫，在凍融循環和干濕循環中容易出現部分或全部脫粘的現象，從而導致防水失效，防水卷材修復裂縫的防水耐久性主要取決于粘結層的耐久性；防水涂料適用于迎水面與背水面的裂縫處理，并且與水泥基材料結合良好，不容易脫落，在凍融循環和干濕循環中也體現出較好的防水耐久性，即使在循環次數增加時，失效也是一個漸變的過程；水泥基滲透結晶型修復材料適用于迎水面與背水面的裂縫處理，經養護后能夠很好的起到防水作用，在凍融循環和干濕循環中，體現出了非常好的防水耐久性，其防水能力并未隨著循環次數的增加而下降，體現出了永久防水和動態防水的效果。 Abstract: Short and long waterproof effects of cementitious material cracks after dealing with waterproof coiled materials, waterproof coatings and cement-based capillary crystalline are studied, and the waterproof durability under freeze-thaw cycles and alternation of drying and wetting is analyzed and compared. The results show that waterproof coiled materials are suitable for dealing with cracks in water surface , and in freeze-thaw cycles and circulation of wetting and drying, they can easily have part or total debonding phenomena, which make the waterproof failure. Waterproof durability of repairing cracks of waterproof coiled materials depends on the durability of bonding layer. Waterproof coatings are suitable for dealing with cracks in water surface, which combine with cementitious materials well and not break off. Waterproof durability has also good performance in freeze-thaw cycles and circulation of wetting and drying. Even the circles increase, the waterproof failure is a gradual process. Repairing materials of cement-based capillary crystalline are suitable for dealing with cracks in water surface. Through curing process, they can play a good role in waterproof. Under freeze-thaw cycles and circulation of wetting and drying, the repairing materials of cement-based capillary crystalline have very good waterproof durability. While the circles increase, the waterproof capacity has not decreased, and the repairing materials have the performances of permanent waterproof and dynamic waterproof.

碳纖維復合材加固T形梁的三維設計軟件開發

史瑞英，趙志平，李占巧

２０10年第4期

摘要

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摘要：利用大型通用有限元軟件提供的二次開發功能，編制了碳纖維復合材加固鋼筋混凝土T形梁的三維設計專用軟件。突破了現有的單一截面設計，能以嶄新的彩色三維方式展示結構整體的承載能力。該軟件除了計算可靠之外，還可提供海量數據，滿足實際工程的需要。 Abstract：Using the finite element software ANSYS 10.0 providing the second development, a special three-dimensional design software for T-shape beams of CFRP strengthened reinforced concrete is developed. It is different from the single-section design, and reveals loading capacity of structure with new colour three-dimensional way. Besides the reliable calculation, the software provides mass dates to meet the practical engineering requirements.

混凝土橋墩病害修補材料的試驗研究

范玉波，張粉芹，馬學寧

２０10年第4期

摘要

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摘要：通過對碳纖維布、玻璃纖維布和復合防水布修補后的混凝土力學性能和耐久性試驗，研究了這些修補材料對混凝土抗壓強度、抗折強度、抗剪強度、抗沖擊性、耐磨性、抗凍性、抗滲性的影響規律。試驗結果表明，碳纖維布和玻璃纖維布修補后的混凝土抗折強度和沖擊韌性高于基準混凝土；玻璃纖維布和復合防水布修補后的混凝土抗剪強度高于基準混凝土；三種修補材料修補后混凝土的耐磨度、抗凍性、抗滲性均優于基準混凝土。 Abstract: Through tests of mechanical properties and durability of repaired concrete by carbon fiber cloth, glass fiber cloth and composite waterproof cloth, the effects of these repairing materials on compressive strength, flexural strength , shear strength, impact resistance, abrasion resistance, frost resistance and permeability resistance of concrete are studied. The results indicate that flexural strength and impact toughness of repaired concrete by carbon fiber cloth and glass fiber cloth is higher than those of the normal concrete; shear strength of repaired concrete by glass fiber cloth and composite waterproof cloth is higher than that of the normal concrete; and abrasion resistance, frost resistance and permeability resistance of repaired concrete by three repairing materials is higher than those of the normal concrete.

碳纖維布約束鋼筋混凝土軸心受壓柱的力學性能研究

黃耀宗1，呂恒林2

２０10年第4期

摘要

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摘要：對碳纖維布約束的鋼筋混凝土柱進行了軸壓性能試驗，研究了混凝土強度、碳纖維布的包裹方式及碳纖維布抗拉強度等因素對約束鋼筋混凝土柱的極限承載力及變形等力學性能的影響。結果表明，隨著混凝土強度的增加，碳纖維布約束加固效果將會降低，碳纖維布強度對其加固效果的影響也逐漸降低。在混凝土強度較低的情況下，采用高強一級碳纖維布加固效果較好；在相同碳纖維布體積加固率的條件下，采用全包碳纖維布約束混凝土的加固方式比間隔包裹碳纖維布條帶效果更好。 Abstract： An axial compression experiment of reinforced concrete columns confined with carbon fiber reinforced polymer(CFRP) sheets was tested. The effects of concrete strength, the way of CFRP sheets wrapped and the tensile strength of CFRP on the ultimate bearing capacity and deformation properties of reinforced concrete columns confined with CFRP are studied. The results indicate that the increasing concrete strength will reduce the reinforcement effect of CFRP sheets, and the strength effect of CFRP will be gradually reduced too. The reinforcement effect of high-strength CFRP is better in the case of low concrete strength. The reinforcement way of entirely wrap of reinforced concrete columns confined with CFRP is better than the reinforcement way of interval wrap under the condition of same volumn reinforcement rate of CFRP sheets.

機場道面纖維混凝土的抗凍性試驗

董祥，沈正

２０10年第4期

摘要

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摘要：纖維混凝土廣泛應用于機場道面的新建與修補，其中的新型合成纖維道面混凝土改善了傳統鋼纖維道面混凝土自重大、成本高、對機輪磨耗大等缺點。在論述機場道面纖維混凝土材料及其抗凍性問題的基礎上，通過快凍法試驗，研究了鋼纖維和聚丙烯纖維的摻入及摻量對道面混凝土抗凍性的不同影響。結果表明，聚丙烯纖維對道面混凝土抗凍性的改善效果優于鋼纖維；聚丙烯纖維對道面混凝土抗凍性的影響存在最佳纖維摻量，摻入1.0%聚丙烯纖維對抗凍性的提高效果最好。 Abstract：Fibre reinforced concrete can be widely used in the construction and repair of airport pavement. New synthetic fibre reinforced pavement concrete improves the shortcomings of traditional steel fibre reinforced pavement concrete, such as great weight, high cost, severe wearing to airplane tires and so on. Based on the discussion of fibre reinforced pavement concretes and its frost resistance of airport pavement, the effects of adding steel fibres and polypropylene fibres into pavement concrete and different fiber dosages on the frost resistance of pavement concrete are researched by fast frost test. The results show that frost resistance of pavement concrete adding polypropylene fibres is better than that adding steel fibres. There is the optimum fibre volume dosage when adding polypropylene fibres into pavement concrete, and adding 1.0% polypropylene fibres can achieve the best improving effect on frost resistance.

BFRP約束鋼筋混凝土方柱的數值模擬分析

熊智文，劉永勝

２０10年第4期

摘要

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摘要：采用ANSYS軟件對玄武巖纖維布（BFRP）約束鋼筋混凝土方柱的軸心受壓過程進行了數值模擬, 得到了BFRP約束混凝土柱的應力分布和裂紋發展情況，并與試驗數據進行了對比分析。結果表明, 選擇分離式有限元數值分析模型, 可較好地模擬BFRP 布約束混凝土柱的軸心受壓性能?；谀M結果，本文對BFRP 加固鋼筋混凝土方柱軸壓破壞過程進行了受力分析,探討了BFRP 布與混凝土在軸壓下相互作用的機理。 Abstract：he process of axial compression of the basalt fiber (BFRP) confined reinforced concrete columns is simulated by using ANSYS software, and the stress distribution and crack development of basalt fiber (BFRP) confined concrete columns are obtained, which are compared and analyzed with the test results. The results show that the discrete model for finite element numerical analysis can simulate the axial loaded behavior of BFRP confined concrete columns. Based on simulation results, the force analysis of the failure process of BFRP confined reinforced concrete square columns is taken and the interaction mechanism between BFRP cloth and concrete under axial compression is discussed.

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