第六期_2022_《混凝土與水泥制品》雜志社

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第六期

改性磷石膏輕骨料在路基材料中的應用研究

呂偉，吳赤球，龔文輝，胡彪

2022年第6期

摘要

引用本文

利用電石渣對磷石膏進行改性，得到了改性磷石膏，將改性磷石膏、水泥、礦渣粉按一定比例混合，采用造粒成球工藝制成改性磷石膏輕骨料，研究了改性磷石膏摻量和養護齡期對改性磷石膏輕骨料性能的影響，分析了改性磷石膏輕骨料替代部分碎石在磷石膏基路基材料中應用的可行性。結果表明：隨著改性磷石膏摻量的增加，改性磷石膏輕骨料的筒壓強度和軟化系數降低，吸水率增大；當改性磷石膏摻量為88%、養護齡期為60 d時，改性磷石膏輕骨料的筒壓強度為5.8 MPa、吸水率為9.8%、軟化系數為0.75，符合GB/T 17431.1—2010《輕集料及其試驗方法第1部分：輕集料》的要求。研制的改性磷石膏輕骨料已成功應用于道路工程中。 The modified phosphogypsum was obtained by modifying phosphogypsum with carbide slag. The modified phosphogypsum, cement, and slag powder were mixed in a certain proportion, and the modified phosphogypsum lightweight aggregate was made by the granulation process. The effects of modified phosphogypsum content and curing age on the properties of modified phosphogypsum lightweight aggregate were studied, and the feasibility of using modified phosphogypsum lightweight aggregate to replace part of crushed stone in phosphogypsum-based subgrade materials was analyzed. The results show that with the increase of modified phosphogypsum content, the cylinder compressive strength and softening coefficient of modified phosphogypsum lightweight aggregate decrease, and the water absorption rate increases. When the content of modified phosphogypsum is 88% and the curing age is 60 d, the cylinder compressive strength of modified phosphogypsum lightweight aggregate is 5.8 MPa, the water absorption rate is 9.8%, and the softening coefficient is 0.75, which meets the requirements of GB/T 17431.1—2010 Lightweight Aggregates and Its Test Methods—Part 1: Lightweight Aggregates. The developed modified phosphogypsum light aggregate has been successfully used in road engineering.

呂偉,吳赤球,龔文輝,等.改性磷石膏輕骨料在路基材料中的應用研究[J].混凝土與水泥制品,2022(6):82-86. LYU W,WU C Q,GONG W H,et al.Research on the Application of Modified Phosphogypsum Lightweight Aggregate in Subgrade Materials[J].China Concrete and Cement Products,2022(6):82-86.

凝灰巖粉對水工混凝土耐久性能的影響研究

張平1，馬旭東1，劉洋1，鄭?？?，李紹純2

2022年第6期

摘要

引用本文

研究了凝灰巖粉的摻量和比表面積對水工混凝土耐久性能（抗滲性能、抗凍性能、抗硫酸鹽侵蝕性能）的影響，并通過壓汞法從微觀層面對摻凝灰巖粉水工混凝土的孔結構進行了分析。結果表明：當凝灰巖粉的比表面積為352 m2/kg，且摻量控制在30%以下時，有利于改善水工混凝土的抗滲性能和抗硫酸鹽侵蝕性能；凝灰巖粉的比表面積越大，對水工混凝土中小孔的填充作用越好，但對大孔的填充作用不明顯。 The effects of the content and specific surface area of tuff powder on the durability(impermeability, frost resistance and sulfate corrosion resistance) of hydraulic concrete were studied, and the pore structure of hydraulic concrete mixed with tuff powder was analyzed from the micro level by mercury injection method. The results show that when the specific surface area of tuff powder is 352 m2/kg and the content of tuff powder is controlled below 30%, it is beneficial to improve the impermeability and sulfate corrosion resistance of hydraulic concrete. The larger the specific surface area of tuff powder, the better the filling effect of small pores in hydraulic concrete, but the filling effect of large pores is not obvious. ?

張平,馬旭東,劉洋,等.凝灰巖粉對水工混凝土耐久性能的影響研究[J].混凝土與水泥制品,2022(6):87-90,104. ZHANG P,MA X D,LIU Y,et al.Study on the Influence of Tuff Powder on the Durability of Hydraulic Concrete[J].China Concrete and Cement Products,2022(6):87-90,104.

鎳鐵渣粉對水泥基復合材料性能的影響研究

羅才松1,2，陳華艷2，劉旭宏1，祁皚1

2022年第6期

摘要

引用本文

研究了鎳鐵渣粉摻量對鎳鐵渣粉-水泥復合膠凝材料標準稠度用水量、凝結時間的影響，分析了鎳鐵渣粉-水泥膠砂試件的抗壓強度、抗折強度，探討了鎳鐵渣粉-硅灰-水泥膠砂試件的力學性能。結果表明：鎳鐵渣粉-水泥復合膠凝材料的標準稠度用水量、凝結時間均與鎳鐵渣粉摻量呈正相關，而鎳鐵渣粉-水泥膠砂試件的抗壓強度、抗折強度均與鎳鐵渣粉摻量呈負相關，且鎳鐵渣粉的摻量不宜大于30%；硅灰能有效改善鎳鐵渣粉-硅灰-水泥膠砂試件的內部結構，提高其強度，且鎳鐵渣粉與硅灰的總摻量不宜大于30%，鎳鐵渣粉和硅灰的質量比不宜小于1。 The effects of the ferronickel slag powder content on the standard consistency water consumption and setting time of ferronickel slag powder-cement composite cementitious material were studied. The compressive strength and flexural strength of ferronickel slag powder-cement mortar specimens were analyzed, and the mechanical properties of ferronickel slag powder-silica fume-cement mortar specimens were discussed. The results show that the standard consistency water consumption and setting time of ferronickel slag powder-cement composite cementitious material are positively correlated with the ferronickel slag powder content, while the compressive strength and flexural strength of ferronickel slag powder-cement mortar specimens are negatively correlated with the ferronickel slag powder content, and the ferronickel slag powder content should not be greater than 30%. Silica fume can effectively improve the internal structure and strength of ferronickel slag powder-silica fume-cement mortar specimen, and the total content of ferronickel slag powder and silica fume should not be greater than 30%, and the mass ratio of ferronickel slag powder to silica fume should not be less than 1.

羅才松,陳華艷,劉旭宏,等.鎳鐵渣粉對水泥基復合材料性能的影響研究[J].混凝土與水泥制品,2022(6):91-95. LUO C S,CHEN H Y,LIU X H,et al.Influence of Ferronickel Slag Powder on Properties of Cement-based Composites[J].China Concrete and Cement Products,2022(6):2022(6):91-95.

牡蠣殼粉對再生骨料透水混凝土性能的影響

于琦1，張思雨1，李長江1，王玉璞1，王騰1，全洪珠2

2022年第6期

摘要

引用本文

于琦,張思雨,李長江,等.牡蠣殼粉對再生骨料透水混凝土性能的影響[J].混凝土與水泥制品,2022(6):96-98. YU Q,ZHANG S Y,LI C J,et al.Effect of Oyster Shell Powder on Properties of Recycled Aggregate Pervious Concrete[J].China Concrete and Cement Products,2022(6):2022(6):96-98.

抹面砂漿原材料與應用研究進展

陳坤1,2，李育彪1,2，柯春云1,2，何方1

2022年第6期

摘要

引用本文

陳坤,李育彪,柯春云,等.抹面砂漿原材料與應用研究進展[J].混凝土與水泥制品,2022(6):99-104. CHEN K,LI Y B,KE C Y,et al.Progress on Raw Materials and Application of Rendering Mortar[J].China Concrete and Cement Products,2022(6):2022(6):99-104.

混凝土箱梁分層澆筑水化熱實測與模擬分析

鄒惠瓊，白洪濤，李梅

2022年第6期

摘要

引用本文

為探究混凝土箱梁在分層澆筑施工過程中水化熱溫度的發展規律及其溫度應力，對某主跨230 m的大跨度預應力混凝土箱梁橋零號塊水化熱進行了連續觀測，并基于觀測結果和有限元數值模擬計算，分析了零號塊水化過程中底板、腹板和橫隔板的溫度應力發展規律；同時，討論了分層澆筑和整體澆筑兩種不同施工方案對零號塊水化熱溫度應力分布的影響，研究了拆模時間對結構內外溫度的影響程度。結果表明：內外溫差在結構內部產生的溫度應力超過了材料的抗拉強度，從而導致了溫度裂縫的產生；采用分層澆筑施工的零號塊將在上下層混凝土交界面附近形成一條拉應力帶；過早拆模會使混凝土內外溫差迅速擴大，而養護4 d后拆?；炷羶韧鉁夭钕鄬^小，建議零號塊拆模前養護時間不宜少于4 d。 In order to explore the development law of concrete hydration heat temperature of box girder by distinct-layer casting and accurately calculate the temperature stress, the concrete hydration heat in the No.0 block of box girder of a long span (230 m) PC continuous bridge was observed continuously. Based on the field test results and the numerical simulation calculation by FEA, the temperature stress development law of the bottom plate, web and diaphragm were analyzed. Meanwhile, the influence of the construction scheme on the hydration heat temperature stress of the No.0 block of box girder was discussed and the influence of the form removal time on temperature difference was researched. The results show that the excessive temperature difference can cause the excessive temperature stress and the temperature cracks. Besides, the tensile stress field can be formed near the interface between the top and the bottom concrete in the No.0 block of box girder by distinct-layer casting. The research results also show that the form removal time should not be less than 4 days to prevent temperature cracks.

鄒惠瓊,白洪濤,李梅.混凝土箱梁分層澆筑水化熱實測與模擬分析[J].混凝土與水泥制品,2022(6):77-81. ZOU H Q,BAI H T,LI M.Measurement and Simulation Analysis of Hydration Heat of Layered Pouring Concrete Box Girder[J].China Concrete and Cement Products,2022(6):77-81.

GB/T 40399—2021《裝配式混凝土建筑用預制部品通用技術條件》主要條文解析

王春蓉1，鈕如嵩1，胡佳星2，奚飛達1，田寅1，史星祥1，潘從玲1，鄧稚川1，夏如茜1

2022年第6期

摘要

引用本文

新制定的國家標準GB/T 40399—2021《裝配式混凝土建筑用預制部品通用技術條件》已于 2022年3月1日實施。為便于該標準的使用方準確理解標準條款的具體含義，正確貫徹實施標準條款的具體要求和規定，介紹了該標準的編制背景和意義，并對標準的主要條款及其制定理由進行了解釋和說明。 The newly formulated national standard of GB/T 40399—2021 General Technical Conditions for Precast Concrete Part of Prefabricated Construction has been officially implemented in March 1st, 2022. In order to facilitate understanding the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms by the users, the purpose and significance of the standard are introduced, and the main provisions of the standard and the revision reasons are expained.

王春蓉,鈕如嵩,胡佳星,等.GB/T 40399—2021《裝配式混凝土建筑用預制部品通用技術條件》主要條文解析[J].混凝土與水泥制品,2022(6):71-76. WANG C R,NIU R S,HU J X,et al.Analysis of Main Clauses in GB/T 40399—2021 General Technical Conditions for Precast Concrete Part of Prefabricated Construction[J].China Concrete and Cement Products,2022(6):71-76.

配筋超高性能混凝土梁抗彎性能有限元分析

宋斌，劉芳

2022年第6期

摘要

引用本文

基于ABAQUS有限元軟件，采用混凝土塑性損傷（CDP）模型模擬了超高性能混凝土（UHPC）的本構關系，使用三維實體單元和桁架單元模擬了UHPC和縱筋之間的接觸關系，研究了配筋率、截面有效高度與截面高度比值和UHPC抗拉強度對UHPC梁抗彎性能的影響。結果表明：隨著配筋率的提高和截面有效高度與截面高度比值的增大，UHPC梁的屈服荷載、峰值荷載以及對應的撓度均明顯提高；隨著UHPC抗拉強度的增大，UHPC梁的峰值荷載和屈服荷載增大，但峰值荷載和屈服荷載對應的撓度減小。 Based on ABAQUS finite element software, the constitutive relationship of ultra-high performance concrete (UHPC) was simulated by concrete damage plasticity(CDP) model, and the contact relationship between UHPC and longitudinal reinforcement were simulated by three-dimensional solid element and truss element. The effects of reinforcement ratio, the ratio of effective section height to section height and UHPC tensile strength on the flexural performance of UHPC beam were studied. The results show that the yield load, peak load and corresponding deflection of UHPC beam increase significantly with the increase of reinforcement ratio and the ratio of effective section height to section height. With the increase of UHPC tensile strength, the peak load and yield load of UHPC beam increase, but the deflections corresponding to peak load and yield load decrease.

宋斌,劉芳.配筋超高性能混凝土梁抗彎性能有限元分析[J].混凝土與水泥制品,2022(6):58-61. SONG B,LIU F.Finite Element Analysis of Flexural Performance of Reinforced Ultra-high Performance Concrete Beams[J].China Concrete and Cement Products,2022(6):58-61.

陶粒泡沫混凝土輕質隔墻板研究

項澤強1，唐昊1，呂澤文1，顏小波1，梁澤鋒2，孟志武1

2022年第6期

摘要

引用本文

項澤強,唐昊,呂澤文,等.陶粒泡沫混凝土輕質隔墻板研究[J].混凝土與水泥制品,2022(6):62-65. XIANG Z Q,TANG H,LYU Z W,et al.Study on Ceramsite Foamed Concrete Light Weight Panels for Partition Wall[J].China Concrete and Cement Products,2022(6):62-65.

基于細觀特征的泡沫混凝土導熱系數有限元模擬

蔣俊1，黨文婧1，管小軍2，石友安3，徐田圓1，吳艷萍2，劉鐵2，李睿智3，金超2，李軍1，盧忠遠1，張魁寶1

2022年第6期

摘要

引用本文

在泡沫混凝土孔結構實測參數的基礎上，基于隨機算法構建了泡沫混凝土代表性體積單元（RVE）模型，結合voxel網格技術，在周期性邊界條件下模擬了泡沫混凝土的傳熱。結果表明：基于球體隨機產生算法構建的RVE模型與泡沫混凝土的實測孔結構特征高度一致，孔徑分布平均偏差最高為-2.0%，孔隙率平均偏差為-0.1%；基于voxel網格技術在周期性邊界條件下求解出的泡沫混凝土導熱系數模擬值與實測值的平均偏差僅為-3.1%，具有良好的可靠性。 Based on the measured pore structure parameters of foamed concrete, the representative volume element (RVE) model of foamed concrete was established based on randomized algorithm. Combined with voxel grid technology, the heat transfer of foamed concrete was simulated under periodic boundary conditions. The results show that the RVE model based on randomized ball generation algorithm is highly consistent with the measured pore structure characteristics of foamed concrete, the maximum average deviation of pore size distribution is -2.0%, and the average deviation of porosity is -0.1%. The average deviation between the simulated and measured values of thermal conductivity of foamed concrete based on voxel grid technology under periodic boundary conditions is only -3.1%, which has good reliability.

蔣俊,黨文婧,管小軍,等.基于細觀特征的泡沫混凝土導熱系數有限元模擬[J].混凝土與水泥制品,2022(6):66-70. JIANG J,DANG W J,GUAN X J,et al.Finite Element Simulation on Thermal Conductivity of Foamed Concrete Based on Mesoscopic Characteristics[J].China Concrete and Cement Products,2022(6):66-70.

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