第三期_2019_《混凝土與水泥制品》雜志社

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第三期

粗骨料取代率對廢陶瓷混凝土力學性能的影響

蘇有文，李嬌，李雪瑩，呂雄飛

２０19年第3期

摘要

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摘要：為研究廢陶瓷對混凝土力學性能的影響，選取了六種不同狀態的廢陶瓷以0、45%、50%、55%、60%、65%、70%、75%、100%的取代率等質量替換天然石子，共制作了294個廢陶瓷混凝土抗壓試件和抗折試件，養護28 d后分別測試其抗壓強度和抗折強度。通過對試驗數據的分析，研究了不同廢陶瓷取代率對混凝土抗壓強度和抗折強度的影響，并運用回歸分析方法建立了不同廢陶瓷取代率下廢陶瓷混凝土抗壓強度和抗折強度的預測公式。 Abstract: In order to study the effect of waste ceramics on the mechanical properties of concrete, a systematic study was conducted to replace natural stones with mass such as 0, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 100% replacement rate. Six kinds of waste ceramics in different states were selected to make a total of 294 standard compressive and standard flexural specimens of waste ceramic concrete. After curing for 28 days, the standard compressive strength and flexural strength were tested respectively. Based on the analysis of experimental data, the effects of different replacement rates of waste ceramics on the standard compressive strength and flexural strength were studied. The regression analysis method is used to establish the prediction formula of the standard compressive strength and flexural strength of the waste ceramic concrete with different replacement rates.

蘇有文,李嬌,李雪瑩,等.粗骨料取代率對廢陶瓷混凝土力學性能的影響[J].混凝土與水泥制品,2019(3):97-100. SU Y W,LI J,LI X Y,et al.Effects of Replace Rate of Coarse Aggregate on Mechanical Properties of Waste Ceramics Concrete[J].China Concrete and Cement Products,2019(3):97-100.

建筑垃圾再生微粉基本材性及對水泥膠砂性能的影響

周文娟1，季志遠1，趙磊1，何更新2

２０19年第3期

摘要

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摘要：為探索建筑垃圾再生微粉用作摻合料的可行性，制備了三種細度的廢磚、廢混凝土再生微粉，測試其物化性質，并研究不同組成、細度、摻量的再生微粉對水泥膠砂性能的影響。結果表明，組成對水泥膠砂性能影響不大，細度和摻量有較大影響；Ⅱ級再生微粉工作性較好、強度較高；摻量在20%以內對膠砂流動性的降低并不明顯，且抗壓、抗折強度比分別在85%、75%以上。 Abstract: In order to explore the feasibility of using recycled powder as admixture，waste bricks and waste concrete recycled powder were prepared in three kinds of fineness. The physicochemical properties were tested and the effects of different compositions, fineness and dosage of recycled powder on the performance of cement mortar were studied. The results show that the composition has little effect on the performance of cement mortar, and the fineness and dosage has great influence. The grade II recycled powder has better working performance and higher strength; the reduction of the fluidity of the mortar within 20% is not obvious, and the compressive and flexural strength ratios are above 85% and 75% respectively.

周文娟,季志遠,趙磊,等.建筑垃圾再生微粉基本材性及對水泥膠砂性能的影響[J].混凝土與水泥制品,2019(3):93-96. ZHOU W J,JI Z Y,ZHAO L,et al.Basic Performance of Construction Waste Recycled Powder and Its Influence on Properties of Cement Mortar[J].China Concrete and Cement Products,2019(3):93-96.

下穿厚砂層的混凝土鉆孔灌注樁施工關鍵技術研究

黃瑋1，張健1，文華2，孔超2，吳九江2

２０19年第3期

摘要

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摘要：通過昆明南站鉆孔灌注樁的工程應用實例，介紹了厚砂層地基中灌注樁基施工的工程特點，并對3種施工方案進行比選，最終確定選用優化后的“淺護筒加泥漿護壁”工藝，該方法保證了樁基施工的安全、質量、進度。同時，對泥漿制備與循環、鋼筋骨架制作與安裝、混凝土灌注等施工關鍵技術的控制進行了論述，解決了下穿厚砂層地基中鉆孔灌注樁施工的難題。 Abstract: Through engineering application examples of bored cast-in-place piles in Kunming south railway station, the engineering features of the construction of cast-in-place pile foundation in thick sand layer foundation are introduced, and the comparison of three construction schemes is carried out. Finally, the optimized shallow casing with mud protection drilled bores technology is selected, which guarantees safety, quality and progress. At the same time, slurry preparation and circulation, construction and installation of reinforcement cages, concrete infusion and other construction methods are discussed, the difficulties in construction of bored cast-in-place piles under the thick sand layer foundation are solved.

黃瑋,張健,文華,等.下穿厚砂層的混凝土鉆孔灌注樁施工關鍵技術研究[J].混凝土與水泥制品,2019(3):89-92. HUANG W,ZHANG J,WEN H,et al.Research on Key Technology of Bored Cast-in-place Pile Construction under Thick Sand Layer[J].China Concrete and Cement Products,2019(3):89-92.

南京長江公鐵大橋三維擾動對混凝土力學性能的影響

李雷1，謝德擎2,3，石亮2,3，周方1

２０19年第3期

摘要

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摘要：南京長江公鐵大橋封閉修繕前，在鐵路線運營時對混凝土澆筑部位的擾動信息進行了采集與分析，獲取了不同方位的振幅與頻率。利用振篩試驗機模擬澆筑部位的三維擾動，設計并研究了不同擾動制度對混凝土力學性能的影響。結果表明，初凝后1 h起振及持續振動的混凝土試塊受擾動后損傷最為嚴重，抗壓強度最大降低幅度為25%左右，抗折強度幾乎降為零；初凝前1 h起振的混凝土受擾動之后，試塊表面剝落嚴重，均勻性降低導致強度下降15%左右。 Abstract: Before the closure and repair of Nanjing Chang Jiang Railway Bridge，the vibration information at concrete placement under railway operating is gathered and analyzed ,then amplitude and frequency in different directions are obtained. Tthe influence of different 3D vibration systems on the strength of concrete is studied, based on the shaker tester. Results show that the damage of concrete at 3D vibration systems, start vibrating one hour after initial set and continuous vibrating, are the most serious. The reduction of compressive strength is about 25%, while the flexural strength is almost zero. The reductions of strength of concretes at 3D vibration systems which start vibrating at and before initial set are about 15%，while the surface of the test concretes are seriously peeled off.

李雷,謝德擎,石亮,等.南京長江公鐵大橋三維擾動對混凝土力學性能的影響[J].混凝土與水泥制品,2019(3):85-88. LI L,XIE D Q,SHI L,et al.Effects on Mechanical Properties of Concrete of Three-dimensional Disturbance of Nanjing Yangtze River Railway Bridge[J].China Concrete and Cement Products,2019(3):85-88.

樁基檢測技術的發展與應用研究

程志和，鄧友生，孫雅妮，蔡夢真

２０19年第3期

摘要

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摘要：以樁基檢測技術的基本原理為研究基礎，綜合國內外常用的樁基檢測方法及工程應用等發展動態，對樁身完整性、基樁承載力和強度展開討論，指出了樁基工程質量檢測技術的優勢及其局限性，提出了樁基檢測技術未來的研究方向和發展前景。 Abstract: Taking the basic principle of pile foundation detection technology as the research foundation, comprehensive development of pile foundation detection methods and engineering applications at home and abroad, the pile integrity, pile bearing capacity and strength are discussed, and the quality inspection of pile foundation engineering is pointed out. The advantages of technology and its limitations. The future research directions and development prospects of pile foundation detection technology are briefly described.

程志和,鄧友生,孫雅妮,等.樁基檢測技術的發展與應用研究[J].混凝土與水泥制品,2019(3):80-84. CHENG Z H,DENG Y S,SUN Y N,et al.Development and Application Study on Pile Foundation Detection Technology[J].China Concrete and Cement Products,2019(3):80-84.

?；⒅樯皾{攪拌過程中骨料分布均勻性研究

涂沛，程忠慶，韓瑞杰

２０19年第3期

摘要

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摘要：為定量研究?；⒅樯皾{在攪拌過程中骨料分布均勻性受攪拌條件的影響，對新拌?；⒅樯皾{中的骨料進行分離，并根據分離得到的骨料與砂漿質量占比，定義了評價新拌砂漿中骨料分布均勻性的均勻度指數。試驗結果表明：新拌砂漿中骨料分布均勻性隨攪拌時間的延長呈先優化后劣化的變化趨勢，攪拌過程中存在最優均勻度；臥式與立式攪拌機均在攪拌至4 min時達到最佳均勻度，臥式攪拌機的新拌砂漿中骨料分布均勻度優于立式攪拌機；?；⒅楣橇蠀⑴c攪拌的時間相同時，采用先攪拌后投入?；⒅楣橇系姆绞侥軌騼灮橇戏植嫉木鶆蛐?。更高的攪拌機轉速能更快提升新拌?；⒅樯皾{均勻度，但是較低的攪拌機轉速下拌和的新拌?；⒅樯皾{極限均勻度更優，達到極限的耗時更長。 Abstract: In order to quantitatively study the uniformity of aggregate distribution during the stirring process of glazed hollow bead mortar, the aggregate of the fresh glazed hollow bead mortar was separated. According to the mass ratio of aggregate and mortar obtained by separation, the uniformity index for evaluating the uniformity of aggregate distribution in fresh mortar is defined. The test results show that the uniformity of aggregate distribution in fresh mortar is firstly optimized and then deteriorated with the extension of stirring time, and the optimum uniformity exists during the mixing process. Both horizontal and vertical mixers achieve optimum uniformity when stirred for 4 minutes. The uniformity of aggregate distribution in the new mortar of the horizontal mixer is better than that of the vertical mixer; when the glazed hollow bead aggregates participate in the same stirring time, the uniformity of aggregate distribution can be optimized by first mixing and then feeding into vitrified microbead aggregates. Higher mixer speeds can increase the uniformity of fresh glazed hollow bead mortar faster, but the fresh glazed hollow bead mortar blended at lower mixer speeds has better uniformity and longer time to limit.

涂沛,程忠慶,韓瑞杰.?；⒅樯皾{攪拌過程中骨料分布均勻性研究[J].混凝土與水泥制品,2019(3):75-79. TU P,CHENG Z Q,HAN R J.Research on Aggregate Distribution of Glazed Hollow Bead Mortar during the Mixing Process[J].China Concrete and Cement Products,2019(3):75-79.

可拆式鋼筋桁架混凝土樓板承載力試驗研究

樊軼江

２０19年第3期

摘要

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摘要：針對實際工程中常用的壓型鋼板-鋼筋桁架組合樓板存在的不足之處，將壓型鋼板替換為可拆卸的木塑模板，以形成一種新型組合樓板。試驗研究了兩個可拆式鋼筋桁架混凝土樓板的承載力。結果表明，可拆式鋼筋桁架混凝土樓板正常使用階段的破壞形態與普通樓板相似，并提出了適宜可拆式鋼筋桁架混凝土樓板的承載力計算公式。同時通過分析底部木塑模板對整體承載力的影響，認為可拆式鋼筋桁架模板是一種值得推廣應用的樓板形式。 Abstract: In view of the shortcomings of the profiled steel plate-reinforced truss composite floor slab commonly used in practical engineering, the profiled steel plate was replaced with a detachable wood plastic formwork to form a new composite slab. The bearing capacity test of two detachable reinforced concrete slabs were carried out. The results show that the failure mode of the detachable reinforced concrete slabs in normal use is similar to that of ordinary slabs, and the suitable reinforced concrete truss concrete is proposed. The calculation formula of the bearing capacity of the floor. At the same time, the analysis of the bottom wood-plastic formwork has a certain impact on the overall bearing capacity, the detachable reinforced truss formwork is a form of slab that is worthy of popularization and application.

樊軼江.可拆式鋼筋桁架混凝土樓板承載力試驗研究[J].混凝土與水泥制品,2019(3):71-74. FAN Y J.Experimental Study on Bearing Capacity of Detachable Reinforced Concrete Slabs[J].China Concrete and Cement Products,2019(3):71-74.

玻璃輕石混凝土砌塊孔型優化設計分析

楊正俊1，鄒昀2，高傳超 2，周虹2

２０19年第3期

摘要

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摘要：在研發一種以玻璃輕石為骨料的輕質混凝土的基礎上，研制了玻璃輕石混凝土自保溫砌塊。為了得到最優的自保溫砌塊的孔型設計方案，設計了三種自保溫砌塊孔型，利用ABAQUS有限元軟件進行數值模擬，研究塊型對熱工性能的影響，得到有利用實際生產和工程應用的孔型方案。結果表明，三種塊型的導熱系數減小在17.1%以上。增大孔洞率、減小孔間距可以減小熱橋的橫截面積，有利于提高空心砌塊的保溫隔熱能力。 Abstract: Based on the research and development of a kind of lightweight concrete with glass lightweight stone as aggregate, the self-insulation block of glass lightweight stone concrete is further developed. In order to obtain the optimal hole design of self-insulating block, three self-insulating block holes were designed. The ABAQUS finite element software was used for numerical simulation to study the influence of block type on thermal performance. Hole plan for production and engineering applications. The results show that the thermal conductivity of the three block types is reduced by 17.1% or more. Increasing the hole rate and reducing the hole spacing can reduce the cross-sectional area of the thermal bridge, which is beneficial to improve the thermal insulation capacity of the hollow block.

楊正俊,鄒昀,高傳超,等.玻璃輕石混凝土砌塊孔型優化設計分析[J].混凝土與水泥制品,2019(3):68-70. YANG Z J,ZOU Y,GAO C C,et al.Optimum Design on Hole Type of Block of Glass Lightweight Stone Concrete[J].China Concrete and Cement Products,2019(3):68-70.

化學發泡泡沫混凝土裂縫的成因及控制措施

劉紅飛1，薛力梨1，蔣元海1，沈焱2，王香港2，鮑益偉3

２０19年第3期

摘要

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摘要：闡述了化學發泡法制備泡沫混凝土的過程，分析了泡沫混凝土裂縫產生的主要原因，并提出如何減少這些裂縫的措施。研究表明：新拌泡沫混凝土料漿的均勻性和穩定性是化學發泡泡沫混凝土產品質量的關鍵；發泡膨脹和凝結時呈現的不均勻性是裂縫產生的主要原因，溫差應力是次要原因；研制的平衡壓板法可有效減少泡沫混凝土料漿和胚體的裂縫。 Abstract: The process of making foamed concrete by chemical foaming method was represented, the main causes of foam concrete cracks were analyzed, measures of reducing the cracks were also offered. Researches show that the uniformity and stability of fresh foam concrete slurry is key to the quality of chemical foam concrete, then unevenness of foaming expansion and condensation is the main cause of cracks, and the thermal stress is the secondary cause, besides, balanced platen method could reduce the cracks effectively.

劉紅飛,薛力梨,蔣元海,等.化學發泡泡沫混凝土裂縫的成因及控制措施[J].混凝土與水泥制品,2019(3):64-67. LIU H F,XUE L L,JIANG Y H,et al.Cause and Controlling Measures of Cracks of Chemical Foaming Foam Concrete[J].China Concrete and Cement Products,2019(3):64-67.

摻玄武巖纖維的水泥固化風積砂無側限抗壓強度試驗研究

閆景晨，張欣，鄭建龍

２０19年第3期

摘要

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摘要：將玄武巖纖維作為外摻材料摻入水泥固化風積砂中，對不同水泥摻量及玄武巖纖維摻量的水泥固化風積砂進行無側限抗壓強度試驗研究。結果表明，在水泥固化風積砂中摻入玄武巖纖維后，玄武巖纖維可在水泥固化風積砂中均勻分布，形成一種良好的相互交錯的支撐體系；摻入玄武巖纖維可以提高試件強度,且在纖維含量為0.5%時試件的抗壓強度最大；隨著水泥摻量的增加和齡期的增長，摻纖維水泥固化風積砂的抗壓強度逐漸增加。 Abstract: Using basalt fiber as a additive mixture with cement solidified aeowan sand, the experiment on unconfined compressive strength of solidified aeowan sand with different dosages of cement and basalt fiber is carried out. The results show that after adding basalt fibers into the cement solidified aeowan sand, basalt fibers are evenly distributed in the cement solidified aeowan sand, developing a kind of interrelated supporting system; the compressive strength could be enhanced as the contribution of adding basalt fibers and the compressive strength rise to the peak when the dosage of basalt fibers is 0.5%; along with the increasing of the dosage of cement and age, the compressive strength is gradually increasing.

閆景晨,張欣,鄭建龍.摻玄武巖纖維的水泥固化風積砂無側限抗壓強度試驗研究[J].混凝土與水泥制品,2019(3):60-63. YAN J C,ZHANG X,ZHENG J L.Experimental Research on Unconfined Compressive Strength of Cement Solidified Aeolian Sand with Basalt Fiber[J].China Concrete and Cement Products,2019(3):60-63.

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