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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    第二期

    港珠澳大橋澳門口岸管理區大型多層停車庫薄壁清水混凝土配制技術
    港珠澳大橋澳門口岸管理區大型多層停車庫薄壁清水混凝土配制技術
    • 張躍輝,焦守增
    2019年第2期
    摘要
    引用本文
    摘 要:介紹了港珠澳大橋澳門口岸管理區大型多層停車庫薄壁清水混凝土配制技術。通過建立新拌混凝土性能量化參數,試驗驗證了膠凝材料用量、水膠比、礦粉、外加劑等對清水混凝土性能的影響。根據確定的性能量化參數及試驗方法進行了薄壁結構清水混凝土性能配合比設計。驗證結果表明,所配置的清水混凝土均符合項目中對薄壁清水混凝土性能的要求。 Abstract: The preparation technology of thin-walled structure fair-faced concrete for Large multi-storey parking garage in Macao port management zone of Hongkong-Zhuhai-Macao bridge was introduced. The quantitative parameters of fresh concrete performance were established, and the effects of cementing material dosage, W/B, mineral powder and admixture on the performance of fair-faced concrete were tested. According to the determined performance quantification parameters and test methods, the performance mix design of thin-walled structure fair-faced concrete was carried out. On-site verification of the design mix ratio indicates that the results meet the requirements for the performance of thin-walled fair-faced concrete in the project.
    張躍輝,焦守增.港珠澳大橋澳門口岸管理區大型多層停車庫薄壁清水混凝土配制技術[J].混凝土與水泥制品,2019(2):1-5. ZHANG Y H,JIAO S Z.Preparation Technology of Thin-wall Architecture Concrete for Large Multi-storey Parking Garage in Macao Port Management Zone of Hong Kong-Zhuhai-Macao Bridge[J].China Concrete and Cement Products,2019(2):1-5.
    干濕-溫度雙循環作用下氯離子在混凝土中的傳輸性能研究
    干濕-溫度雙循環作用下氯離子在混凝土中的傳輸性能研究
    • 王晉寶,許盛龍,田美靈,李 強,王亞軍
    2019年第2期
    摘要
    引用本文
    摘 要:采用自然擴散法研究了混凝土在海洋環境中的氯離子擴散行為,探討了水灰比、溫度、干濕循環和溫度循環對混凝土氯離子擴散性能的影響。試驗模擬了干濕循環和晝夜溫差循環作用對不同水灰比混凝土中氯離子傳輸的影響。結果表明,浪濺區混凝土要比水下區混凝土中氯離子擴散得更快,且溫度循環對氯離子擴散有一定的影響,在實際工程中不能忽視晝夜溫度循環對氯離子擴散系數的影響。 Abstract: The diffusion behavior of chloride ion in concrete under the marine circumstance was studied by natural diffusion method. And the effect of W/C, temperature, dry-wet cycle and temperature cycle on the diffusion property of chloride ion in concrete was discussed. The effects of dry-wet cycle and diurnal temperature difference on chloride transport in concrete with different W/C were simulated in laboratory. The experimental results show that the chloride diffusion of concrete in the splash area is faster than that in the underwater area. Temperature cycle has a certain influence on the diffusion of chloride ion. Therefore, the effect of diurnal temperature cycle on the chloride diffusion coefficient can not be ignored in practical engineering.
    王晉寶,許盛龍,田美靈,等.干濕-溫度雙循環作用下氯離子在混凝土中的傳輸性能研究[J].混凝土與水泥制品,2019(2):6-9. WANG J B,XU S L,TIAN M L,et al.Study on Transport Pr operties of C hloride Ion in Concrete under the Action of Dry-wet Cycle and Temperature Cycle[J].China Concrete and Cement Products,2019(2):6-9.
    縫隙透水路面透水性能研究
    縫隙透水路面透水性能研究
    • 張磊蕾,曹 可,王武祥,李海亮,廖禮平,王愛軍
    2019年第2期
    摘要
    引用本文
    摘 要 :采用單一堵塞材料、復合堵塞材料來模擬縫隙透水路面堵塞過程,并用透水系數恢復率來表征縫隙透水路面透水性能恢復程度。研究結果表明,采用單一堵塞材料來堵塞縫隙透水路面時,隨著堵塞材料粒徑的減小,透水路面透水系數恢復率降低愈明顯。根據路面實際情況,提出了透水路面透水性能恢復試驗研究時復合堵塞材料組成及用量。為保證縫隙透水路面透水系數恢復率達到80%,縫隙寬度宜設置為10 mm,清理措施宜采取真空度低于-20 kPa的吸塵器清理和2~4 MPa壓力水清理的雙重措施。 Abstract: The single clogging material and composite clogging material are used to simulate the clogging process of gap permeable pavement, and the permeability coefficient recovery rate is used to characterize the permeability performance recovery of gap permeable pavement. It is shown that as the particle size of the clogging material decreases, the permeability coefficient recovery rate of the permeable pavement decreases more obviously. According to the actual situation of the road surface, the composition and dosage of composite clogging material during the test study of permeable performance recovery are proposed. In order to ensure the permeability coefficient recovery rate of the gap permeable pavement reach 80%, the gap width should be set to 10 mm, and the cleaning measures should take double measures of vacuum cleaner cleaning with a vacuum of less than -20 kPa and 2~4 MPa pressure water cleaning.
    張磊蕾,曹可,王武祥,等.縫隙透水路面透水性能研究[J].混凝土與水泥制品,2019(2):10-12. ZHANG L L,CAO K,WANG W X,et al.Study on Permeability Performance of Gap Permeable Pavement[J].China Concrete and Cement Products,2019(2):10-12.
    全球預拌混凝土市場研究
    全球預拌混凝土市場研究
    • 郭曉華,牛凱征,王曙明,王曉芳
    2019年第2期
    摘要
    引用本文
    摘 要:預拌混凝土作為房屋和基礎設施建設最重要的基礎材料,在世界范圍內特別是“一帶一路”沿線國家的市場空間巨大。本文通過梳理全球預拌混凝土行業及國際知名企業的發展現狀,探尋行業基本發展規律,可為我國預拌混凝土企業走向國際市場提供參考和借鑒。 Abstract: Ready mixed concrete is the most important basic material for building and infrastructure construction. It has huge market space in the world, especially along the "One Belt and Road". The development status of the global ready-mixed concrete industry and international concrete giants are systematically combed, and the basic development law of the industry is explored, which can provide reference for China's ready-mixed concrete enterprises to enter the international market.
    郭曉華,牛凱征,王曙明,等.全球預拌混凝土市場研究[J].混凝土與水泥制品,2019(2):13-17. GUO W H,NIU K Z,WANG S M,et al.Research on Ready Mixed Concrete in Global Market[J].China Concrete and Cement Products,2019(2):13-17.
    有側壓混凝土動態劈拉強度理論研究
    有側壓混凝土動態劈拉強度理論研究
    • 吳 聰,彭 剛
    2019年第2期
    摘要
    引用本文
    摘??要:對尺寸為300mm×300mm×300mm的立方體混凝土試件進行4種應變速率(10-5、10-4、5×10-4、10-3)和5種側壓(0、2MPa、4MPa、6MPa、8MPa)下的劈拉試驗,對比分析有側壓混凝土動態劈拉受荷全過程的力學特性及變化規律。研究結果表明,有側壓混凝土材料劈拉強度隨應變速率增大而增大,不同應變速率下混凝土劈拉強度隨側壓增大均表現出先增大后減小的變化規律,不同應變速率下混凝土最大劈拉強度對應的側壓比基本相等。Abstract:Theconcretedynamicsplittingtensileexperimentsonfourstrainrates?(10-5、10-4、5×10-4、10-3)andfivelateralpressures(0,2MPa,4MPa,6MPa,8MPa)ofthecubeconcretespecimenwith300mm×300mm×300mmwerecarriedout.AndtheconcretedynamicsplittingtensilemechaniccharacteristicandchangingruleofthewholeprocesswithlateralpressurewereComparedandanalyzed.Theresearchresultsshowthatthetensilestrengthofconcreteunderlateralpressureincreaseswiththeincreaseofstrainrate.Andthesplittingtensilestrengthofconcreteunderdifferentstrainratefirstlyincreasesthendecreaseswiththeincreaseoflateralpressure.Thelateralpressureratioofthemaximumtensilestrengthofconcreteisbasicallysameunderdifferentstrainrates.
    吳聰,彭剛.有側壓混凝土動態劈拉強度理論研究[J].混凝土與水泥制品,2019(2):18-21. WU C,PENG G.Research on Dynamic Tensile Strength Theory of Concrete with Lateral Pressure[J].China Concrete and Cement Products,2019(2):18-21.
    基于流變性能的聚合物水泥砂漿配合比影響研究
    基于流變性能的聚合物水泥砂漿配合比影響研究
    • 張珂峰
    2019年第2期
    摘要
    引用本文
    摘 要:通過室內試驗測定了不同配合比聚合物水泥砂漿的剪切應力和表觀黏度值以研究其流變性能變化規律。結果表明:增大砂灰比和水灰比,聚合物水泥砂漿的屈服應力增大,塑性黏度減??;增加可再分散性乳膠粉的摻量,聚合物水泥砂漿的屈服應力不變,但塑性黏度增大;增大纖維素醚摻量,聚合物水泥砂漿的屈服應力先增后劇減,塑性黏度增大。 Abstract:The shear stress and apparent viscosity of polymer cement mortars with different mixing ratios were measured by laboratory tests. The relationship curves were drawn to reflect the rheological properties of the mortars. The results show that with the increase of sand-cement ratio and water-cement ratio, the yield stress of mortars increases, but the plastic viscosity of mortars decreases; with the increase of amount of redispersible polymer powder, the yield stress remains unchanged and the plastic viscosity decreases; with the increase of cellulose ether content, the yield stress increases first and then decreases and the plastic viscosity increases.
    張珂峰.基于流變性能的聚合物水泥砂漿配合比影響研究[J].混凝土與水泥制品,2019(2):22-25. ZHANG K F.Research on the Influence of Mix Proportion of Polymer Cement Mortar on its Rheological Properties[J].China Concrete and Cement Products,2019(2):22-25.
    硅灰對LC15級全輕混凝土工作性影響研究
    硅灰對LC15級全輕混凝土工作性影響研究
    • 胡丹萍, 陶學明
    2019年第2期
    摘要
    引用本文
    摘 要:采用廣安地區生產的輕質骨料配制了LC15級全輕骨料混凝土,分析了硅灰對輕骨料混凝土工作性、干表觀密度、抗壓強度的影響。并通過研究硅灰對輕骨料混凝土漿體流變性能的影響解釋了其宏觀性能的變化。試驗結果表明:在10%摻量范圍內,硅灰降低了輕骨料混凝土的工作性,提高了其干表觀密度及抗壓強度。摻入硅灰的輕骨料混凝土漿體可以用修正的賓漢姆模型進行擬合。擬合結果表明:輕骨料混凝土的工作性下降是由于其漿體屈服應力及塑性黏度的提高,同時塑性黏度提高亦增加了漿體與骨料的黏結能力,從而提高了輕骨料混凝土的力學性能。 Abstract: LC15 lightweight aggregate concrete was prepared by using the lightweight aggregates produced in Guang’an area, and the effect of silica fume on the workability, drying density and compressive strength of the lightweight concrete was studied. Furthermore, the explanations for macro properties changes from the rheological properties of pastes were put forward. The experimental results show that the addition of silica fume within the range of 10% decreases the workability of lightweight concrete but increases the drying density and compressive strength of that. The rheological parameters of pastes with silica fume can be obtained from modified Bingham model. The results from rheological parameters show that the decreasing workability is attributed to the increasing yield stress and plastic viscosity of pastes. Meanwhile, the adhesive properties is also improved due to the increasing plastic viscosity of pastes, which is also responsible for the increasing mechanical properties of lightweight concrete.
    胡丹萍,陶學明.硅灰對LC15級全輕混凝土工作性影響研究[J].混凝土與水泥制品,2019(2):26-29. HU D P,TAO X M.The Effecting Study of Silica Fume on Workability of LC15 Grade All Lightweight Concrete[J].China Concrete and Cement Products,2019(2):26-29.
    不對稱配筋纖維混凝土盾構管片正截面配筋計算
    不對稱配筋纖維混凝土盾構管片正截面配筋計算
    • 魏 瑩,王永安
    2019年第2期
    摘要
    引用本文
    摘 要:采用fib Model Code 2010中纖維對受彎承載力貢獻的作用方式,并結合GB 50010—2010《混凝土結構設計規范》中偏心受壓構件正截面受力分析,提出了不對稱配筋纖維混凝土盾構管片配筋計算方法。以國內某地鐵工程管片配筋計算為例,采用該方法計算了纖維混凝土管片正截面配筋并與普通混凝土管片配筋進行對比。同時,計算分析了采用不同等級纖維混凝土時該管片正截面配筋的變化規律。結果表明,纖維的加入可以降低鋼筋用量,該方法結合了歐洲規范和國內的鋼筋混凝土設計規范,具有較高的可靠性,可用于纖維混凝土盾構隧道管片設計。 Abstract: Based on the fib Model Code 2010 and GB 50010—2010 Code for Design of Concrete Structures, a calculation method for steel fiber reinforced concrete tunnel segments with asymmetric reinforcement was proposed. The method was used to calculate the amount of reinforcement for steel fiber reinforced concrete tunnel segment in a Chinese metro engineering, and compared with that of common concrete segments. And also, the effect of different classes of SFRC on the reinforcement ratio of segment was analyzed. The results indicate that steel fibers can reduce the amount of steel reinforcement in segment. The proposed method which based on fib Model Code 2010 and GB 50010—2010 has high reliability and can be used to design SFRC tunnel segment.
    魏瑩,王永安.不對稱配筋纖維混凝土盾構管片正截面配筋計算[J].混凝土與水泥制品,2019(2):30-35. WEI Y,WANG Y A.Calculation Method of Steel Fiber Reinforced Concrete Tunnel Segments with Asymmetric Reinforcement[J].China Concrete and Cement Products,2019(2):30-35.
    粉煤灰-礦粉膠凝體系對CRTSⅢ型板自密實混凝土工作性影響機理研究
    粉煤灰-礦粉膠凝體系對CRTSⅢ型板自密實混凝土工作性影響機理研究
    • 顧曉彬,劉 磊,高海浪,王成啟
    2019年第2期
    摘要
    引用本文
    摘 要:通過J環障礙高差試驗、充填比試驗、擴展度試驗、擴展速度試驗等方法,研究了不同配比的粉煤灰-礦粉膠凝體系對CRTSⅢ型板自密實混凝土流動性、間隙通過性、填充性以及力學性能的影響。同時,通過粉煤灰-礦粉不同配比膠凝體系的水泥凈漿黏度試驗,進一步探索了粉煤灰-礦粉膠凝體系對CRTSⅢ型板自密實混凝土工作性的影響機理。結果表明,膠凝體系摻量不宜超過膠凝材料總量的40%;粉煤灰-礦粉復摻時,當復摻比例為25%∶15%和20%∶10%,混凝土綜合性能較好;礦粉及粉煤灰摻量增加可提高混凝土黏度,降低擴展度,但由于粉煤灰的粒徑較小可充分發揮填充效應和滾珠效應,能夠達到減水和增加流動性的作用,研究結果可為高性能CRTSⅢ型板自密實混凝土的配制提供參考。 Abstract: The J-ring barrier height difference test, filling ratio test, expansion test and other test methods were used to study the fluidity, passability, filling and mechanical properties of CRTSⅢ type self-compacting concrete with different proportions of fly ash and ore powder gelling system. At the same time, the cement paste viscosity test of mixed fly ash and mineral powder was carried out to further explore the influence mechanism of fly ash-mineral cementation system on the workability of CRTSⅢ type self-compacting concrete. The results show that the total amount of fly ash and mineral powder should not exceed 40% of the total amount of cementitious materials, and when fly ash and mineral powder are compounded, the proportion of compounding is 25%∶15% and 20%∶10% concrete composite performance is better. The cement paste viscosity test shows that the increase of the content of mineral powder and fly ash will increase the viscosity of the concrete, resulting in a decrease in the working performance of the concrete. However, due to the small particle size of the fly ash, the filling effect and the ball effect can be fully exerted, and the water reduction can be achieved, which can provide a reference for the high-performance CRTSⅢ type self-compacting concrete.
    顧曉彬,劉磊,高海浪,等.粉煤灰-礦粉膠凝體系對CRTSⅢ型板自密實混凝土工作性影響機理研究[J].混凝土與水泥制品,2019(2):36-39. GU X B,LIU L,GAO H L,et al.Mechanism Research of Fly Ash-slag Cementitious System on Workability of CRTS Ⅲ Type Plates Filled with Compacting Concrete[J].China Concrete and Cement Products,2019(2):36-39.
    高強鋼筋混凝土梁疲勞抗彎剛度試驗研究
    高強鋼筋混凝土梁疲勞抗彎剛度試驗研究
    • 封喜波,司文靜
    2019年第2期
    摘要
    引用本文
    摘 要:通過對8根高強鋼筋混凝土梁進行抗彎靜載試驗和疲勞試驗,探究了鋼筋強度等級、混凝土強度等級及配筋率對高強鋼筋混凝土梁疲勞抗彎剛度的影響,分析了疲勞試驗過程中高強鋼筋混凝土梁撓度的變化規律。試驗結果表明,鋼筋強度等級對梁的疲勞抗彎剛度影響不明顯,配筋率是影響疲勞抗彎剛度的重要因素,提高混凝土、鋼筋等級及配筋率可顯著提高梁的疲勞抗彎剛度。重復荷載作用200萬次后,梁的承載力有所下降,下降幅度小于5%,荷載作用過程中,梁的撓度得到了充分發展。 Abstract: Based on the static and fatigue bending tests of 8 high strength reinforced concrete beams, the influence of the strength grade of steel bar and the ratio of reinforcement on the bending rigidity of the high-strength reinforced concrete beams was studied. The development law of high-strength reinforced concrete beams during the process of fatigue loading was analyzed. The result shows that the steel strength grade has little effect on the flexural stiffness of beams, the ratio of reinforcement is an important factor to affect the bending fatigue stiffness, and increasing the ratio of concrete, steel grade as well as reinforcement ratio can significantly improve the bending stiffness of beam. After the number of the repeated load reaches 2 million times, the bearing capacity of beams drops less than 5%. In the process of loading, the deflection of beams can fully develop.
    封喜波,司文靜.高強鋼筋混凝土梁疲勞抗彎剛度試驗研究[J].混凝土與水泥制品,2019(2):40-43. FENG X B,SI W J.Experimental Study on the Flexural Rigidity of High-strength Reinforced Concrete Beams under Fatigue Loading[J].China Concrete and Cement Products,2019(2):40-43.
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