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    蘇州混凝土水泥制品研究院有限公司

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    第一期

    赤泥的性能及其用作礦物摻合料的研究
    赤泥的性能及其用作礦物摻合料的研究
    • 王軍委1,李秋義1 ,唐 巍2,張修勤1,齊秀山1
    2015年第1期
    摘要
    引用本文
    摘 要:概述了赤泥的物理性質、化學組成和礦物組成,研究了赤泥在混凝土中的應用。研究表明,赤泥作為礦物摻合料,當摻量為20%時,可以改善赤泥-水泥體系的抗折強度,又不會對抗壓強度造成過大損失;在水泥用量相同時,雙摻赤泥和粉煤灰體系的強度要高于單摻赤泥或粉煤灰體系的強度;堿激發劑有利于雙摻體系強度的增長。 Abstract:The physical properties, chemical components and mineral composition of red mud are summarized, and the application of red mud in the concrete is studied. The study indicates that red mud as a kind of mineral admixtures can improve the flexural strength of red mud-cement system and will not have a significant impact on the compressive strength when content of red mud is 20%; the strength of red mud-ash-cement system is generally higher than that of red mud-cement system and fly ash-cement system under the same amount of cement. The alkaline activator can improve the strength of red mud-fly ash-cement system.
    混摻鋼屑鐵砂水泥砂漿壓敏性研究
    混摻鋼屑鐵砂水泥砂漿壓敏性研究
    • 趙若紅, 區浩文,傅繼陽
    2015年第1期
    摘要
    引用本文
    摘 要:在砂漿中混摻鋼屑和鐵砂兩種工業廢棄料,制備得到環保低成本的水泥基復合材料,在測定其抗壓強度的基礎上采用交流兩電極法研究其導電性能和壓敏性能,并分析研究了混摻摻量、彈塑性荷載、不同加載速率以及沖擊荷載等對其壓敏性的影響。試驗結果表明,隨著導電材料摻量增加,試件壓敏性更加明顯。加載速率越大,試件電阻率變化越大;沖擊荷載數值對瞬間電阻率與卸載后電阻率均有較大影響。 Abstract:Two industrial waste materials of steel crape and iron sand were mixed to add into cement system to produce cement based composite material that was low cost and environment friendly. Its conductivity and varistor properties were studied by AC two wire method on the basis of the compressive strength test. And the effect of conducting waste contents, elastic-plastic loads, the various load rate and impact loads on the compression sensitivity of the composite material was studied and analyzed. The test results show that cement-based composite material has favorable varistor properties. With the increase of conducting material contents, the varistor properties of the composite material is more obvious; the greater the loading rate, the greater the resistance changes; the larger the impact load, the faster the resistivity falls.
    預制裝配式混凝土外墻施工技術
    預制裝配式混凝土外墻施工技術
    • 李 瑩
    2015年第1期
    摘要
    引用本文
    摘 要:介紹了某住宅工程項目中預制裝配式混凝土外墻的施工應用,并就其深化設計、生產制作、運輸、吊裝、安裝等方面的施工工藝技術進行了分析和研究,結合該工程施工中的經驗和教訓,對于預制裝配式混凝土外墻施工技術在建筑工業化中的應用提出了建議。 Abstract:The construction application of the prefabricated concrete external wall in a residential project is introduced, and its deepening design, production, transportation, hoisting and installation of construction technology are analyzed and studied. In addition, combined with the experiences and lessons in engineering construction, some suggestions on the application of prefabricated concrete external wall construction technology in the building industrialization are put forward.
    頂管法施工對土體影響的理論分析與數值計算
    頂管法施工對土體影響的理論分析與數值計算
    • 黃以春,蔡海兵,李 陽
    2015年第1期
    摘要
    引用本文
    摘 要:為探討頂管法施工時造成的土體擾動,以合肥市某頂管工程為背景,運用理論分析與數值模擬相結合的方法對施工時的地層應力場、位移場及地表隆沉的變化過程和分布規律進行了研究并對地表位移進行了監測。結果表明,頂管施工時管道周圍一定范圍內的土體會受到擾動,管道底部、腰部分別出現最大豎向拉應力、最大豎向壓應力;管道上方的土體擾動區域大于下方土體,管道底部和頂部位置土體分別出現最大隆起和最大沉降,隨著管道的頂進隆起值減小而沉降值增大,管道軸線遠處土體的位移基本為零;地表隆沉曲線以管道軸線為對稱軸近似正態分布,在掌子面前方地層表現為隆起而后方為沉降狀態。 Abstract:In order to investigate the soil disturbance caused by the pipe jacking construction, the soil stress-displacement field and surface deformation during construction were studied with theoretical and numerical simulation methods based on a pipe-jacking project in Hefei and the surface displacement was monitored. The results show that the soil is disturbed in a certain range around the pipe while the pipe jacking, the maximum vertical tensile stress and the maximum vertical compressive stress are in the bottom and the middle of the pipe respectively; the disturbance area above the pipe is bigger than that of the below. The maximum uplift an settlement are in the top and the bottom respectively, the upheaval decreases while the settlement increases with the pipe jacking, the displacement of soil far from the pipe axis is about zero; the surface deformation curves is approximate a normal distribution whose symmetry axis is the axis of the pipe, the soil layer uplifts in front of tunnel face, then settles behind it.
    再生混凝土砌塊熱工性能試驗研究
    再生混凝土砌塊熱工性能試驗研究
    • 張鋒劍1,白國良2,楊政梁3
    2015年第1期
    摘要
    引用本文
    摘 要:通過正交試驗研究了生產砌塊用再生混凝土的熱工性能,利用極差分析影響再生混凝土導熱系數的因素,找出了再生混凝土熱工性能各因素的影響規律,并結合再生混凝土砌塊強度要求,優化了組合各因素水平取值,給出了再生混凝土砌塊具有較好熱工性能及較高抗壓強度的配合比。在此基礎上,進行了再生混凝土砌塊墻體的傳熱系數性能試驗研究,結果表明,再生混凝土砌塊墻體與普通墻體相比具有良好的熱工性能。 Abstract: The thermal performance of recycled concrete block is studied by orthogonal experimental and the main influence factors on thermal conductivity of recycled concrete is analyzed using range analysis in order to find the influence law of the factors on thermal performance of recycled concrete. The values of various factors are optimized based on the strengths of recycled concrete block, the optimum mix proportion of recycled concrete block with great thermal performance and relatively high compressive strength is obtained. On this basis, heat transfer performance of recycled concrete block wall is tested. The results show that the thermal performance of recycled concrete block wall is better than that of ordinary wall.
    植物纖維增強型?;⒅樘樟;炷僚浜媳仍O計
    植物纖維增強型?;⒅樘樟;炷僚浜媳仍O計
    • 胡玉龍,陳國新,陳亮亮
    2015年第1期
    摘要
    引用本文
    摘??要:采用正交試驗設計方法,考慮水泥摻量、?;⒅閾搅?、植物纖維參量及砂摻量四個因素在三個水平下的影響,配置植物纖維增強型?;⒅樘樟;炷疗鰤K,對材料抗壓強度、拉壓比和導熱系數進行了極差分析、方差分析,采用功效系數分析法,確定滿足一定考察指標的材料最優配合比。結果表明:水泥摻量是影響抗壓強度的最主要因素,也是最顯著因素;植物纖維能有效地提高材料的拉壓比;?;⒅槟軌蜉^好地改善材料的熱工性能,其摻量對于抗壓強度及拉壓比的影響較小。提出了抗壓強度在5.0~7.5MPa范圍內的最優配合比。Abstract:Byusingthemethodoforthogonalexperimentaldesignandconsideringtheinfluenceofcementcontent,glassbeadscontent,plantfiberparametersandsandcontentunderthreelevels,glazedhollowbeadandhayditeconcreteblockwithplantfiberwasprepared.Throughrangeanalysis,analysisofvariance,andtheefficiencycoefficientanalysisofcompressivestrength,tension-compressionratioandthermalconductivityoftheblockmaterial,theoptimummixproportionwhichmakesblocktosatisfycertainindicatorisdetermined.Theresultsshowthatcementcontentisnotonlythemostimportantfactoraffectingthecompressivestrengthofmaterial,butalsothemostsignificantfactor;addingplantfibercaneffectivelyimprovethetensionandcompressionratioofmaterial;addingglassbeadscanimprovethethermalperformanceofmaterial,butitscontentwaslessaffectedforcompressivestrengthandtensionandcompressionratioofmaterial.Theoptimummixproportionisputforwardtoget5.0~7.5MPaofcompressivestrength.
    硫酸鹽侵蝕下石灰石復合礦物摻合料混凝土梁抗彎性能試驗研究
    硫酸鹽侵蝕下石灰石復合礦物摻合料混凝土梁抗彎性能試驗研究
    • 徐國強1,2,張 薇1,唐 偉1,王夢賽1
    2015年第1期
    摘要
    引用本文
    摘 要:對經受硫酸鎂溶液長期浸泡腐蝕后的石灰石復合礦物摻合料混凝土梁進行了抗彎承載力試驗,對比分析了不同浸泡環境下混凝土梁的腐蝕情況、抗彎性能、變形特征和破壞形態。試驗結果表明,石灰石復合礦物摻合料混凝土梁在室外環境下采用10%硫酸鎂溶液浸泡300d后,發生了以石膏結晶侵蝕為主導的破壞,與在水中浸泡的混凝土梁相比,浸泡在硫酸鎂溶液中的混凝土梁的抗彎性能稍有下降,開裂荷載和極限荷載略有降低,裂縫擴展速度稍快,破壞時的撓度和延性有所降低,混凝土梁在受力過程中正截面應變符合平截面假定。 Abstract: The flexural behavior of limestone compound mineral admixture concrete beam eroded by magnesium sulfate solution at long-term period was studied, and the corrosion degree, flexural behavior, deformation features and failure mode of concrete beams in different environment were analyzed. Test results show that the limestone compound mineral admixture concrete beam submerged in 10% magnesium sulfate solution after 300d in outdoor environment is broken mainly because of gypsum crystallization erosion. Compared with the concrete beam submerged in water, flexural behavior, cracking load and ultimate load of the former beam decrease slightly, the crack propagation speed grows fast as well as the deflection and ductility of the failure beams decrease. The cross section strain of concrete beam is accord with plane section assumption during the loading process.
    肋形纖維混凝土永久模板與新澆混凝土結合面抗剪強度試驗研究
    肋形纖維混凝土永久模板與新澆混凝土結合面抗剪強度試驗研究
    • 周 乾1,張亞仿2,荀 勇1,吳發紅1,丁佳駒3
    2015年第1期
    摘要
    引用本文
    摘 要:針對肋形混凝土永久性模板與結構新澆混凝土之間粘接問題,制作了與肋形模板原理相同的試件及對比試件共四種24個,用雙面剪的方法對試塊進行了新老混凝土的粘結面抗剪試驗。試驗結果表明,摻PVA纖維并帶寬、高均為10mm肋的試件粘結面的抗剪強度是整體混凝土抗剪強度的85.78%,能夠滿足利用永久性模板澆筑的板、墻類構件抗剪要求。同時,對新老混凝土粘結面抗剪能力的計算方法進行了探討。 Abstract: In view of the adhesive problems between the ribbed concrete permanent template and structure new pouring concrete, 24 specimens (four types) using the same principle as ribbed template are made, and the shear tests of bonding surfaces of the new and old concrete are carried out by the method of double-sided shear. The test results show that shear strength of bonding surface of specimen with PVA fiber and 10mm of width and height rib is 85.78% of shear strength of the overall concrete, and it can satisfy the requirements of using permanent template to pour plate and shear wall components. In addition, the calculation method on shear capacity of bonding surfaces of the new and old concrete is discussed.
    纖維混凝土在鐵路工程中的應用
    纖維混凝土在鐵路工程中的應用
    • 李化建1,2,楊 魯1,2,黃法禮1,2,易忠來1,2,譚鹽賓1,2
    2015年第1期
    摘要
    引用本文
    摘 要:為推動纖維混凝土在高速鐵路工程中的應用,選擇鐵路工程橋梁-橋面防水防護層、隧道-襯砌噴射混凝土、軌道-軌枕和附屬結構-電纜槽蓋板等結構部位,總結了纖維混凝土在這些結構中應用現狀,尤其是在高速鐵路工程中的應用現狀。結合鐵路工程纖維混凝土相關的標準與工程實際,提出纖維混凝土在鐵路工程應用過程所存在的問題,并給出了相應的建議。 Abstract:To promote the application of fiber reinforced concrete in high-speed railway engineering, the bridge in railway engineering - waterproof protective layer of deck, the tunnel - lining shotcrete, the track - sleeper and the accessory structure – cover plates of cable and other structures are selected. Application of fiber reinforced concrete in these structures is summarized, especially the application status in high-speed railway engineering. Combined with standards and engineering conditions of fiber reinforced concrete in railway engineering, some problems on application of fiber reinforced concrete in railway engineering and the recommendations are put forward.
    基于抗滲性的纖維混凝土耐久性評價體系
    基于抗滲性的纖維混凝土耐久性評價體系
    • 王學志,鄭淑文,賀晶晶,鄒浩飛,孔祥清
    2015年第1期
    摘要
    引用本文
    摘 要:對當前國內外混凝土耐久性評價方法進行了綜合評述,并基于混凝土抗滲性與耐久性之間的密切關系建立了“基于抗滲性的纖維混凝土耐久性綜合評價體系”?;谶@一評價體系,結合纖維混凝土的特點建立了“基于抗滲性的纖維混凝土耐久性評價體系模型”。通過對聚丙烯纖維混凝土、玄武巖纖維混凝土以及玄武巖-聚丙烯混雜纖維混凝土的抗水滲性、抗凍融性和抗硫酸鹽腐蝕性進行試驗研究,對各系列纖維混凝土抗滲性指標D1與抗凍融性指標D2、抗硫酸鹽腐蝕性指標D3關系進行擬合,并得到了基于抗滲性的玄武巖-聚丙烯混雜纖維混凝土耐久性評價模型,進一步驗證了“基于抗滲性的纖維混凝土耐久性評價體系模型”的合理性。 Abstract: The methods for evaluating the durability of concrete at home and abroad were reviewed. The "integrated evaluation system for durability of concrete based on the permeability" was established based on the close relationship between concrete permeability and durability. Based on the evaluation system, the "integrated evaluation system for durability of fiber concrete based on the permeability" was established combined with characters of fiber concrete. Experimental researches were carried out on resistance to water permeability, freeze-thaw resistance and corrosion resistance to sulphate of polypropylene fiber reinforced concrete, basalt fiber reinforced concrete and basalt - polypropylene fiber reinforced concrete; through the experimental data analysis, the relationships between water resistance indexes D1 with resistance to freezing and thawing indexes D2 and sulphate resisting corrosion indexes D3 of fiber reinforced concrete were simulated, and the integrated evaluation system for durability of basalt-polypropylene fiber reinforced concrete based on the permeability was gotten, and then the rationality of " integrated evaluation system for durability of fiber reinforced concrete based on the permeability" was verified.
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