第四期_2019_《混凝土與水泥制品》雜志社

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第四期

鋼粒對聚丙烯纖維再生混凝土性能的影響

王兵1，朱平華2，許飛1，吳書安1

２０19年第4期

摘要

引用本文

摘要：將不同鋼粒摻量（0、5%、10%、20%）和1.2 kg/m3聚丙烯纖維摻入再生骨料取代率為100%的再生混凝土中，研究其工作性和力學性能。結果表明，鋼?？梢杂行Ц纳凭郾├w維再生混凝土的流動性，且對其保水性能影響較??；不同鋼粒摻量會引起聚丙烯纖維再生混凝土抗壓強度波動，隨著鋼粒摻量的增加其劈拉強度有一定降低，較優的鋼粒摻量為5%。 Abstract: To study the working performance and mechanical properties of recycled concrete with 100% replacement rate of recycled aggregate, different steel content (0, 5%, 10%, 20%) and 1.2 kg/m3 polypropylene fiber were mixed into recycled concrete. The results show that the fluidity of polypropylene fiber recycled concrete can be effectively improved by adding steel particles, and there is a little influence on water retention property of concrete. The different content of steel particles causes the fluctuation of compressive strength of polypropylene fiber recycled concrete, and the splitting tensile strength of concrete is reduced to a certain extent with the increase of steel particles and the better steel particles content of polypropylene recycled concrete is 5%.

王兵,朱平華,許飛,等.鋼粒對聚丙烯纖維再生混凝土性能的影響[J].混凝土與水泥制品,2019(4):97-100. WANG B,ZHU P H,XU F,et al.The Influence of Steel Particles on Properties of Polypropylene Fiber Recycled Concrete[J].China Concrete and Cement Products,2019(4):97-100.

某地下車庫混凝土框架柱施工質量事故分析

史永恒

２０19年第4期

摘要

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摘要：通過對某地下車庫混凝土框架柱的施工質量缺陷進行分析，得到施工質量缺陷產生的原因、危害、影響范圍等。根據缺陷情況制定了相應的加固處理方案，指出了混凝土框架結構澆筑施工時應注意的關鍵點。 Abstract: By analyzing the construction quality defects of concrete frame columns in an underground garage, the causes, harm and influence range of the construction quality defects are obtained. The corresponding reinforcement schemes are worked out according to the defects and the key points that should be paid attention to in pouring construction of concrete frame structure are emphasized.

史永恒.某地下車庫混凝土框架柱施工質量事故分析[J].混凝土與水泥制品,2019(4):92-96. SHI Y H.Analysis on Construction Quality Accidents of Concrete Frame Columns in an Underground Garage[J].China Concrete and Cement Products,2019(4):92-96.

冷水管布置線形及設置參數對承臺水化熱分析的影響

唐楊1，曹海洋1，譚紅梅1，唐衛國2，田俊國2

２０19年第4期

摘要

引用本文

摘要：以重慶市寨子坪大橋為工程背景，研究了管冷的布置線形、布置間距、入水方向以及入水溫度對承臺水化熱分析的影響。通過研究冷水管的三種布置形狀和兩種入水方式，同時改變冷水管布置間距、入水水溫等參數，得到了冷水管布置形狀和入水方式對承臺水化熱分析的影響規律，并對冷水管布置間距和入水水溫提出了建議取值。 Abstract: Taking the Zhaiziping Bridge in Chongqing as the engineering background, the effects of tube cooling layout line, arrangement spacing, inlet water direction and inlet water temperature on the hydration heat analysis of the cap are studied. By studying the three layout shapes of the cold water pipe and the two water inlet modes, and changing the parameters such as the interval of the cold water pipe and the water temperature of the water inlet, the law of influence of the layout line of the cold water pipe and the water inlet mode on the hydration heat analysis of the cap is obtained. Suggested values are proposed for the spacing of the cold water pipes and the temperature of the incoming water.

唐楊,曹海洋,譚紅梅,等.冷水管布置線形及設置參數對承臺水化熱分析的影響[J].混凝土與水泥制品,2019(4):86-91. TANG Y,CAO H Y,TAN H M,et al.Effects of Layout Line of Cold Water Pipes and Setting Parameters on Hydration Heat of the Caps[J].China Concrete and Cement Products,2019(4):86-91.

短切玻璃纖維耐堿性能評價方法研究

葛晨1，王金輝2，談永泉3，楊鼎宜1，4

２０19年第4期

摘要

引用本文

摘要：結合短切玻璃纖維的特征，對EN 14649:2005（E）《預制混凝土制品-水泥和混凝土中玻璃纖維殘留強力的測試方法（SIC TEST）》（歐標）中長玻璃纖維耐堿性能測試方法進行了改進，研發出了一種適用于短切玻璃纖維耐堿性能的測試方法。采用歐標法及改進歐標法對同一品種的玻璃纖維進行試驗，同時進行了平行試驗以驗證改進歐標法的可靠性。結果表明，對于短切玻璃纖維而言，改進歐標法相較于歐標法具有更好的適用性；兩種方法的試驗結果具有一致性，說明了改進歐標法具有較強的實用性和可操作性。 Abstract：According to the characteristics of chopped glass fibers, the testing method of alkali resistance of long glass fibers in EN 14649:2005 (E) Precast concrete products-Test method for strength retention of glass fibers in cement and concrete (SIC test) was improved. The glass fibers of the same variety were tested and compared using the Eurocode method and the improved Eurocode method, then the relevant parallel experiments were carried out to verify the reliability of the improved European standard method. The results show that , the improved Eurocode method has better applicability than the Eurocode method for testing alkali resistance of the chopped glass fibers. The experimental results of the two methods are consistent, which indicates that the improved Eurocode method has strong practicability and operability.

葛晨,王金輝,談永泉,等.短切玻璃纖維耐堿性能評價方法研究[J].混凝土與水泥制品,2019(4):82-85. GE C,WANG J H,TAN Y Q,et al.Evaluation Method Study on Alkali Resistance Performance of Chopped Glass Fibers[J].China Concrete and Cement Products,2019(4):82-85.

DBJ 61/T 139—2017《陜西省城鎮綜合管廊施工與質量驗收規程》編制說明

崔國靜1,2，師瑩瑩1，張磊1，蘇衍江3

２０19年第4期

摘要

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摘要：介紹了DBJ 61/T 139—2017《陜西省城鎮綜合管廊施工與質量驗收規程》的編制背景、編制目的、編制原則，詳細闡述了規程的主要內容、編制重點以及關鍵技術要點，梳理統計了國內相關標準現狀。 Abstract: The background, purpose and principle of the compilation of DBJ 61/T 139—2017 Specification for Construction and Quality Acceptance for Urban Utility Tunnel of Shaanxi Provinceis are systematically introduced, the main contents of the regulations， the emphasis of the compilation and the key technical points of DBJ 61/T 139—2017 are expounded in detail, and the domestic related standard situation is combed and counted.

崔國靜,師瑩瑩,張磊,等.DBJ 61/T 139—2017《陜西省城鎮綜合管廊施工與質量驗收規程》編制說明[J].混凝土與水泥制品,2019(4):78-81. CUI G J,SHI Y Y,ZHANG L,et al.Instruction to the Standard DBJ 61/T 139—2017 Specification for Construction and Quality Acceptance for Urban Utility Tunnel of Shanxi Province[J].China Concrete and Cement Products,2019(4):78-81.

火后鋼筋混凝土框架節點抗震性能有限元分析

王錦燕，岳幸超

２０19年第4期

摘要

引用本文

摘要：基于有限元分析建立了鋼筋混凝土框架節點不同受火時間的溫度場模型及火后的力學計算模型，采用熱力耦合的方法，對節點進行低周反復加載，研究火后節點的抗震性能包括滯回曲線、骨架曲線的變化規律。結果表明，未受火和不同受火時間下，節點彈性階段承載力幾乎不變，而極限承載力在受火后將出現不同程度的降低，隨著受火時間的增加，結構的承載力和剛度明顯降低。 Abstract: The temperature field model of the reinforced concrete frame joints with different fire time and the mechanical calculation model after fire are established based on the finite element analysis. The joints are subjected to low cyclic loading. The post-fire seismic performance of the joints including the variation of the hysteresis curve and the skeleton curve are investigated by using the thermomechanical coupling method. The results show that the bearing capacity in the elastic phase is almost invariable under different fire time, and the ultimate bearing capacity will decrease in different degrees after the fire. The bearing capacity and stiffness of the structure are evidently reduced with the increase of fire time.

王錦燕,岳幸超.火后鋼筋混凝土框架節點抗震性能有限元分析[J].混凝土與水泥制品,2019(4):74-77. WANG J Y,YUE X C.Finite Element Analysis on Seismic Performance of Post-fire Steel Reinforced Concrete Frame Joints[J].China Concrete and Cement Products,2019(4):74-77.

高鈦礦渣輕骨料空心砌塊配合比優化研究

羅凱1,2，李軍1，盧忠遠1，蔣俊1,2，李斌權1,2，白媛1,2，趙杰3

２０19年第4期

摘要

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摘要：通過研究高鈦礦渣堆積空隙率、細鈦礦渣用量對高鈦礦渣空心砌塊基體材料的抗壓強度、干密度的影響，結合前期實驗結果進行配合比的優化調整，在此基礎上，進行了混凝土空心砌塊的實際生產。結果表明，篩分后的高鈦礦渣質量比為m(>1.16 mm)∶m(<1.16 mm)=6∶4時，其空隙率最低為20.2%，此搭配下水泥用量最低，除去用水量，最佳水泥用量為18%左右，與前期實驗結果一致；隨細鈦礦渣用量增加，基體材料抗壓強度先增加后降低，干密度變化不大；在相同水泥用量的條件下，細鈦礦渣的摻入量越多，其抗壓強度越高；優化配比后水泥用量可降至10%，其配比為m(高鈦礦渣)∶m(水泥)∶m(脫硫石膏)∶m(細鈦礦渣)=75∶10∶5∶10，可制備出抗壓強度為5.7 MPa，干密度為1 086 kg/m3，MU5.0的低碳輕骨料空心砌塊。 Abstract: The effects of high-titanium slag bulk porosity and fine titanium slag dosage on the compressive strength and dry density of high-titanium slag hollow block matrix materials were studied, and the blending ratio was optimized and adjusted based on the previous experimental results. The actual production of concrete hollow blocks is canried ast. The results show that the mass ratio of high titanium slag after sieving is m(>1.16 mm)∶m(<1.16 mm)=6∶4, the lowest void ratio is 20.2%. The optimum cement dosage is about 18%, which is consistent with the previous experimental results; as the amount of fine titanium slag increases, the compressive strength of the matrix material increases and then decreases, and the dry density does not change much; under the same cement dosage, the higher the amount of the fine titanium slag, the higher the compressive strength; the optimum amount of cement can be reduced to 10%, and the ratio is m(high titanium slag)∶m(cement)∶m(desulfurized gypsum)∶m(fine titanium slag)=75∶10∶5∶10, a low carbon light aggregate hollow block with a compressive strength of 5.7 MPa, a dry density of 1 086 kg/m3, and MU5.0 can be prepared.

羅凱,李軍,盧忠遠,等.高鈦礦渣輕骨料空心砌塊配合比優化研究[J].混凝土與水泥制品,2019(4):70-73. LUO K,LI J,LU Z Y,et al.Research on Mix Ratio Optimization of Light Aggregate Hollow Blocks with High Titanium Slag[J].China Concrete and Cement Products,2019(4):70-73.

自密實輕骨料混凝土梁抗彎性能試驗研究

董健苗，周悅志，李洋洋，馬發林，殷玲

２０19年第4期

摘要

引用本文

摘要：試驗研究了不同縱向受拉鋼筋配筋率的自密實輕骨料混凝土梁和普通鋼筋混凝土梁的抗彎性能。結果表明，在同級荷載作用下，自密實輕骨料混凝土梁純彎段的裂縫分布較普通鋼筋混凝土梁均勻，其極限抗彎承載力和截面剛度較小，各試驗梁在受力過程中正截面平均應變符合平截面假定；通過增加受拉鋼筋配筋率能夠有效抑制裂縫的發展、增大截面剛度和提高極限抗彎承載力。提出了自密實輕骨料混凝土梁最大裂縫寬度計算公式，驗證了GB 50010—2010《混凝土結構設計規范》中的梁的抗彎極限承載力計算公式適用于本文設計的試驗梁，計算結果與試驗結果均吻合。 Abtract: In this paper, the flexural performance tests are carried out on self-compacting lightweight aggregate concrete beams and ordinary reinforced concrete beams with different longitudinal tensile reinforcement ratios. The results showed that the crack distribution of the pure curved section of the self-compacting lightweight aggregate concrete beam is more uniform than that of the ordinary reinforced concrete beam under the same-stage load. Meanwhile, ultimate bending capacity and section stiffness are small, and the average section normal strain in stress process is in accordance with the plane section assumption. By increasing the reinforcement ratio of the tensile steel bars, the development of cracks can be effectively suppressed, the section stiffness can be increased, and ultimate flexural capacity can be improved. In addition, the formula for calculating the maximum crack width of self-compacting lightweight aggregate concrete beam is proposed. It is verified that the calculation formula of the ultimate bearing capacity of the beam in the Code for GB 50010—2010Concrete Structure Design is applicable to the test beam designed in this paper. The calculated results agree well with the test results.

董健苗,周悅志,李洋洋,等.自密實輕骨料混凝土梁抗彎性能試驗研究[J].混凝土與水泥制品,2019(4):66-69. DONG J M,ZHOU Y Z,LI Y Y,et al.Experimental Study on Flexural Behavior of Self-composite Lightweight Aggregate Concrete Beams[J].China Concrete and Cement Products,2019(4):66-69.

混凝土疊合構件短期剛度計算方法研究

劉洋，楊思忠

２０19年第4期

摘要

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摘要：混凝土疊合構件（梁、板）是裝配式建筑主要使用的水平受力構件。鋼筋混凝土疊合構件、預應力混凝土疊合構件在一次受力、二次受力作用下呈現不同的受力、變形特點。本文闡述了一次、二次受力疊合構件的受力、變形機理，系統總結了疊合構件彎曲變形計算關鍵參數短期剛度的8種計算方法；論述了這8種方法的基本原理、適用范圍，討論了各方法典型的計算公式以及各國規范公式的推導要點；探討了疊合構件短期剛度計算方法需要進一步研究的問題。 Abstract: Concrete composite beams and slabs are main members under horizontal loads in prefabricated building. There are different mechanical and deformation performance of concrete composite members according to reinforced concrete and prestressed concrete in one stage of loading and two stages of loading upon the serviceability limit state. Firstly, special mechanical and deformation performance of the concrete composite members one stage of loading and two stages of loading were introduced. Secondly, eight kinds of calculating methods for short-term stiffness under bending were summarized which was the important parameter for deformation of concrete composite members. The basic principle and scope of application of eight calculating methods were described in which the major points of the deviation of several typical formulas and the current code formulas were emphasized. Finally, it was discussed the issues of calculating methods for short-term stiffness of concrete composite members, which needs further research.

劉洋,楊思忠.混凝土疊合構件短期剛度計算方法研究[J].混凝土與水泥制品,2019(4):59-64. LIU Y,YANG S Z.Research on Calculation Method for Short-term Stiffness of Concrete Composite Members[J].China Concrete and Cement Products,2019(4):59-64.

玄武巖纖維摻量及摻入方式等對混凝土抗壓強度及破壞形態的影響

李曉東，孟強，王文輝，王起臺

２０19年第4期

摘要

引用本文

摘要：為了研究纖維摻入方式和快速養護方式對玄武巖纖維混凝土（BFRC）抗壓強度的影響規律，采用對照試驗方法，每種方式設計五組配合比，并將試件養護7 d和28 d后進行抗壓強度試驗，得出最佳摻量值和最佳摻入方式。同時在最佳玄武巖纖維（BF）摻量下，對BFRC試件7 d和28 d試塊裂縫出現及發展過程進行數據采集記錄；基于素混凝土試件的破壞模式，對BFRC試件破壞形態進行描述。根據試件裂縫出現、發展及破壞時對應的荷載進行對比分析，得出6 kg/m3玄武巖纖維可以有效改善混凝土抗壓強度及受壓破壞變形。 Abstract: In order to study the influence of fiber mixing method and fast curing method on the compressive strength of basalt fiber reinforced concrete (BFRC), five groups of mixing ratios were designed for each method, and the compressive strength test was carried out after the specimens were cured for 7 d and 28 d, and the optimum mixing amount and the optimum mixing method were obtained. At the same time, under the optimum BF content, the crack occurrence and development process of BFRC test block in 7 d and 28 d were recorded. Based on the failure mode of plain concrete test block, the failure mode of BFRC test block was described. According to the comparative analysis of the corresponding loads when cracks appear, develop and destroy, it is concluded that 6 kg/m3 basalt fiber can effectively improve the compressive strength and deformation of concrete.

李曉東,孟強,王文輝,等.玄武巖纖維摻量及摻入方式等對混凝土抗壓強度及破壞形態的影響[J].混凝土與水泥制品,2019(4):55-58. LI X D,MENG Q,WANG W H,et al.The Influence of Basalt Fiber Content and Mixing Methods on Compressive Strength and Failure Mode of Concrete[J].China Concrete and Cement Products,2019(4):55-58.

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