第八期_2020_《混凝土與水泥制品》雜志社

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發布時間：2020-01-06 00:00:00

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第八期

我國商品砂漿技術發展現狀及展望

王培銘

2020年第8期

摘要

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摘 ? 要：從歷史回顧、產品分類、生產技術、應用技術、支撐體系（標準制定、科學研究、學術交流）等方面論述了我國商品砂漿的發展、技術現狀及展望，并針對我國商品砂漿產業在技術上存在的問題，提出了研發方向和建議。 Abstract: The development, technical status and prospect of the commercial mortar are discussed from the aspects of historical review, product classification, production technology, application technology, supporting system (standard setting, scientific research, academic exchange), etc. In view of the technical problems in commercial mortar industry in China, several research and development directions and suggestions are put forward.

王培銘.我國商品砂漿技術發展現狀及展望[J].混凝土與水泥制品,2020(8):1-6. WANG P M.Development Status and Prospect of Commercial Mortar Technology in China[J].China Concrete and Cement Products,2020(8):1-6.

3D打印混凝土層間性能影響因素與測試方法研究綜述

於家勉，孫元峰，姚一鳴，魯聰

2020年第8期

摘要

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摘 ? 要：結合國內外研究案例，深入分析了打印工藝、砂漿配合比等3D打印混凝土層間性能的影響因素。在此基礎上，進一步探討了3D打印混凝土層間強度的提高方式。同時總結了抗拉試驗、抗剪試驗、微觀結構分析等層間強度測試方法并分析了各自優缺點。 Abstract: Based on the review of domestic and foreign researches, factors affecting the interlayer bonding of 3D printed concrete were analyzed, such as mix proportion of mortar and printing process. The existing methods of improving the interlayer bonding of 3D printed concrete were summarized. Finally, bonding test methods such as tensile test, shear test and microstructural analysis were compared and summarized.

於家勉,孫元峰,姚一鳴,等.3D打印混凝土層間性能影響因素與測試方法研究綜述[J].混凝土與水泥制品,2020(8):7-11,17. YU J M,SUN Y F,YAO Y M,et al.The Review of Research on Influencing Factors and Test Methods of Interlayer Performance of 3D Printed Concrete China[J].Concrete and Cement Products,2020(8):7-11,17.

飛機攔阻系統用超輕質混凝土組成設計研究

方俊，王振地，王玲

2020年第8期

摘要

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摘 ? 要：為保持飛機攔阻系統用超輕質混凝土潰縮強度的長期穩定，設計了“P·I水泥+惰性摻合料”膠凝材料體系，基于超輕質混凝土的干密度及潰縮強度的變化規律，確定了關鍵制備參數的適宜取值范圍，研究了超輕質混凝土的孔結構特征。結果表明，“P·I水泥+重質碳酸鈣”體系下超輕質混凝土在60 d后潰縮強度基本保持穩定，重質碳酸鈣摻量為63.0%~64.3%時，超輕質混凝土60~150 d潰縮強度變化率為0.93%~7.08%，壓潰曲線平臺段應力偏差為±4.98%~±9.70%。發泡劑和穩泡劑的推薦摻量分別為4.4%、5.0%，穩泡劑能優化超輕質混凝土孔徑分布。適宜水膠比為0.54~0.56，提高水膠比可能增加氣孔的數量。 Abstract: In order to control the long-term stability of crushing strength of ultra-lightweight concrete used in Engineered Material Arresting System (EMAS), the cementing material system of "P·I cement+inert additive" was designed. Based on the dry density and crushing strength of ultra-lightweight concrete, the appropriate values of inert additive and other key preparation parameters were determined, and the pore structure characteristics of ultra-lightweight concrete was also studied. The results show that under the "P·I cement+heavy calcium carbonate" system, the crushing strength of ultra-lightweight concrete remains basically stable after 60 d. When the dosage of heavy calcium carbonate is 63.0%~64.3%, the change rate of crushing strength from 60 d to 150 d is 0.93%~7.08%, and the stress deviation of the platform segment is ±4.98%~±9.70%. The recommended dosage of foaming agent and foam stabilizer is 4.4% and 5.0% respectively. Foam stabilizer can optimize the pore size distribution of ultra-lightweight concrete. The suitable water- binder ratio is 0.54~0.56. And the increase of water-binder ratio can enlarge the number of pores.

方俊,王振地,王玲.飛機攔阻系統用超輕質混凝土組成設計研究[J].混凝土與水泥制品,2020(8):12-17. FANG J,WANG Z D,WANG L.Mix Proportion Design of Ultra-lightweight Concrete for Engineered Material Arresting System[J].China Concrete and Cement Products,2020(8):12-17.

氧化石墨烯分散方式及其對水泥砂漿力學性能的影響

袁小亞1，高軍2，王遠貴1，魏致強2，曾俊杰1，鄭旭煦1

2020年第8期

摘要

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摘 ? 要：在飽和氫氧化鈣水溶液中，采用木質素磺酸鈣（木鈣）作為助分散劑協同聚羧酸減水劑（PC）對氧化石墨烯（GO）進行分散，并通過吸光度、原子力顯微鏡、Zeta電位、SEM和XRD等研究了木鈣對GO的分散效果及復摻對水泥砂漿力學性能的影響。結果表明：較PC單獨分散GO，額外加入少量木鈣能大幅度改善GO的穩定分散能力；當GO摻量為0.03%、木鈣與GO的質量比為3∶1時，較于PC單獨分散GO試件(即基準試件)，助分散下GO摻配的水泥砂漿試件的3 d抗壓強度、抗折強度分別提升了40.9%和22.5%，28 d抗壓強度、抗折強度分別提升了22.1%和17.2%；相對于基準試件，木鈣助分散下摻配GO的砂漿內部結構更密實；木鈣與PC具有優異的協同分散GO的功效。 Abstract: In saturated calcium hydroxide aqueous solution, calcium lignosulfonate (CL) was used as a co-dispersant and polycarboxylic acid water reducer (PC) to disperse graphene oxide (GO), and through absorbance, atomic force microscopy, Zeta Potential, SEM and XRD were used to study the dispersing effect of wood calcium on GO and the effect of compounding on the mechanical properties of cement mortar. The results show that compared with PC dispersing GO alone, adding a small amount of wood calcium can greatly improve the stable dispersing ability of GO. When the GO content is 0.03% with 3∶1 mass ratio of CL to GO, the 3 d compressive and flexural strength of cement mortar specimens mixed with GO co-dispersed by PC and CL is increased by 40.9% and 22.5%, respectively, as comparison with those of only PC-dispersed GO specimens. 28 d compressive and flexural strength of the cement mortar specimens is increased by 22.1% and 17.2%. The crystal growth of the hydration products of cement is more uniform and the overall internal structure is more compact at the case of the blending of GO co-dispersed by the addition of CL. CL and PC have an excellent synergy on the dispersion of GO.?

袁小亞,高軍,王遠貴,等.氧化石墨烯分散方式及其對水泥砂漿力學性能的影響[J].混凝土與水泥制品,2020(8):18-22,26. YUAN X Y,GAO J,WANG Y G,et al.Dispersion Method of Graphene Oxide and Its Effect on Mechanical Properties of Cement-based Materials[J].China Concrete and Cement Products,2020(8):18-22,26.

聚羧酸系減水劑對水泥砂漿塑性毛細管負壓的影響研究

王冬1,2,3,4，石明建2,3,4，祝燁然1,2,3,4

2020年第8期

摘要

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?摘 ? 要：主要研究了不同類型聚羧酸系減水劑對水泥砂漿塑階段性毛細管負壓發展的影響。試驗結果表明，保坍型和超保坍型聚羧酸減水劑不僅對砂漿流動度損失性能改善明顯，而且對砂漿塑性階段毛細管負壓增長速率也有減緩作用。對于C30混凝土篩出的低強度等級水泥砂漿，保坍型聚羧酸減水劑相對于減水型聚羧酸減水劑能延緩自由水釋放，有效降低砂漿初凝前塑性階段毛細管負壓的增長速率，降低砂漿塑性開裂風險。對于C50混凝土篩出的高強度等級水泥砂漿，超長保坍聚羧酸減水劑降低砂漿初凝前塑性階段毛細管負壓的增長速率有限，與緩凝劑配合可實現有效控制砂漿塑性開裂。 Abstract: The influence of different types of polycarboxylate superplasticizer on the development of the cement mortar capillary depression at plastic stage was studied. The experimental results show that the polycarboxylate superplasticizer with keeping slump and the super keeping slumps not only improve the performance of mortar fluidity loss, but also slow down the mortar plastic capillary depression growth rate. For the cement mortar of low grade screened out from the C30 concrete, compared the polycarboxylate superplasticizer with water reducing with the polycarboxylate superplasticizer with keeping ?slump can release free water effectively and reduce mortar plastic capillary depression growth rate before initial setting mortar, and reduce the risk of mortar plastic cracking. For the cement mortar of the high grade screened out from the C50 concrete，the polycarboxylate superplasticizer with super keeping slumps reduces mortar plastic capillary depression growth rate before initial setting mortar is limited, and the combination of retarder can effectively control the risk of mortar plastic cracking.

王冬,石明建,祝燁然.聚羧酸系減水劑對水泥砂漿塑性毛細管負壓的影響研究[J].混凝土與水泥制品,2020(8):23-26. WANG D,SHI M J,ZHU Y R.The Influence of Polycarboxylate Superplasticizer on Capillary Depression of Cement Mortar at Plastic Stage[J].China Concrete and Cement Products,2020(8):23-26.

滲透型有機硅對砂漿耐生物腐蝕性的影響

郁慕賢

2020年第8期

摘要

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摘 ? 要：通過分析污水半浸環境下涂敷有機硅和未涂敷有機硅的砂漿質量、抗壓強度、礦物組成、微觀結構變化，研究了涂敷滲透型有機硅對砂漿耐生物腐蝕效果的影響。研究結果表明，涂敷滲透型有機硅能顯著改善污水半浸環境下砂漿的耐生物腐蝕性。當腐蝕齡期為240 d時，未涂敷有機硅試樣腐蝕前后質量的變化率為0.51%，抗壓強度為30.8 MPa。涂敷有機硅試樣腐蝕前后質量的變化率為0.31%，抗壓強度為39.5 MPa。 Abstract: By analyzing the quality, compressive strength, mineral composition, and microstructure changes of uncoated silicone and coated silicone mortar in a semi-immersed sewage environment, the effect of coated infiltration silicone on the bio-corrosion resistance of the mortar was studied. The results show that the application of permeable silicone can significantly improve the bio-corrosion resistance of the mortar in the semi-immersion environment of sewage. When the corrosion age is 240 d, the mass change rate of the uncoated silicone sample before and after corrosion is 0.51%, and the compressive strength is 30.8 MPa. The mass change rate of the coated silicone sample before and after corrosion is 0.31%, and the compressive strength is 39.5 MPa.

郁慕賢.滲透型有機硅對砂漿耐生物腐蝕性的影響[J].混凝土與水泥制品,2020(8):27-29. YU M X.Effect of Permeable Silicone on Bio-corrosion Resistance of Mortar[J].China Concrete and Cement Products,2020(8):27-29.

預制清水混凝土看臺板設計研究

姜廣，張東陽，呂雪源，姜偉，王磊，李浩，宋煜

2020年第8期

摘要

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摘 ? 要：針對某大型國際主題公園預制混凝土清水看臺板的三折線雙臺階、踏步與看臺一體化預制形式，從預制方案設計、節點設計、防水設計、構件設計、混凝土配合比設計五方面闡述了看臺的具體設計過程，實現了模擬弧形看臺，減少看臺拼縫的效果，重點解決了內凹踏步構件連接節點和防水設計難題，并保證構件達到清水效果。 Abstract: Aiming at the triple line, double stand, step and stand integrated prefabrication form fair-faced precast concrete stand plate in a certain large-scale international theme park, the precast conceptual design, connection design, waterproof design, component design and mix proportion of concrete design are studied, which effectively fulfill the simulating toward circular stand, the reducing of stand joint and resolve the key points including water recessed step connection design and waterproof design, and achieve fair-faced concrete effect.

姜廣,張東陽,呂雪源,等.預制清水混凝土看臺板設計研究[J].混凝土與水泥制品,2020(8):30-33,42. JIANG G,ZHANG D Y,LYU X Y,et al.Design and Application of Fair-faced Precast Concrete Stand Plate[J].China Concrete and Cement Products,2020(8):30-33,42.

新型預應力混凝土空心支護樁的研究與應用

邱振貴1，何友林1，張武2

2020年第8期

摘要

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摘 ? 要：介紹了一種新型的先張法預應力混凝土空心支護樁，進行了部分樁型的抗彎性能試驗，驗證了計算方法的可靠性。工程案例應用表明，該種樁型應用在工程支護領域，特別是河道與湖泊的水系護岸、市政排水和建筑基坑等以擋土、支護為主的圍護工程上具有一定的應用前景。 Abstract：A new type of pretensioned prestressed concrete hollow supporting pile is introduced，which mainly includes the products shape and the calculation of mechanical properties. And some pile types are selected for bending test to verify the reliability of the calculation method. In addition，the case application shows that in the field of support, this kind of pile has a high promotion value and application prospect in the retaining and supporting engineering of river and lake water system revetment, municipal drainage and building foundation pit as a new type of pile.

邱振貴,何友林,張武.新型預應力混凝土空心支護樁的研究與應用[J].混凝土與水泥制品2020(8):34-37. QIU Z G,HE Y L,ZHANG W.Research and Application of A New Prestressed Concrete Hollow Supporting Pile[J].China Concrete and Cement Products,2020(8):34-37.

低溫、大溫差地區預制混凝土箱梁養護制度研究

趙文斌1，趙永鵬2，劉建勛2

2020年第8期

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摘 ? 要：為研究低溫、大溫差地區預制混凝土箱梁在蒸汽養護條件下溫度及強度變化規律，測試了低溫、大溫差地區不同養護方式（標準養護、蒸汽養護、自然養護）條件下，混凝土試驗箱梁溫度及各齡期（3 d、5 d、7 d、14 d、28 d、56 d）的強度，試驗結果表明：低溫、大溫差地區自然養護條件下，預制混凝土箱梁溫度在澆筑后的28 h時達到峰值，在45 h時降到入模溫度，齡期7 d時溫度降到最低；蒸汽養護恒溫65 ℃較恒溫45 ℃早期強度增長快，而后期56 d齡期時強度小于恒溫45 ?℃。同時，蒸汽養護恒溫45 ℃升溫過程比恒溫65 ℃升溫過程穩定、易控制；56 d混凝土抗壓強度比較，由大到小依次為標準養護＞蒸汽養護（45 ℃）＞蒸汽養護（65 ℃）＞自然養護。 Abstract: In order to study the hydration reaction regularity and strength change of precast concrete box girder at low temperature and large temperature difference area, the temperature of concrete of box girder under different curing methods (standard curing, steam curing, natural curing) at low temperature and large temperature difference areas and the strength of each age (3 d, 5 d, 7 d, 14 d, 28 d, 56 d) were tested. The results show that the temperatures of concrete box girders under natural curing in low temperature and large temperature difference area reach the peak value at 28 h after pouring, and fall to the entering mould temperature at 45 h, then maintain a slow hydration reaction at 3~5 d, and drop to the lowest at 7 d , and the hydration reactions basically ended. Strength of steam curing at 65 ℃ increases faster than that at 45 ℃ in the early stage, but it′s lower than that at 45 ℃ in the later stage of 56 d. And the heating process of steam curing at 45 ℃ is more stable and easy to control than that of 65 ℃. According to the compressive strength of concrete at the age of 56 d, the strength is of the decreasing order among is standard curing, steam curing at 45 ℃ and steam curing at 65 ℃ and natural curing.

趙文斌,趙永鵬,劉建勛.低溫、大溫差地區預制混凝土箱梁養護制度研究[J].混凝土與水泥制品,2020(8)38-42. ZHAO W B,ZHAO Y P,LIU J X.Study on Steam Maintenance Technology of Precast Concrete Box Girder at Low Temperature and Large Temperature Difference Area[J].China Concrete and Cement Products,2020(8):38-42.

鋼纖維增強超高性能混凝土抗壓強度尺寸效應研究

江晨暉1,2,3，周堂貴4，王利強5，張克儉4，黃俊3，朱雨磊3

2020年第8期

摘要

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摘 ? 要：考察了3種配合比的鋼纖維增強超高性能混凝土/超高性能混凝土（UHPSFRC/UHPC）抗壓強度的尺寸效應，分析了試件尺寸、試件形狀、養護制度、齡期等因素對抗壓強度的影響，探討了以小尺寸試件替代標準試件測試UHPSFRC/UHPC抗壓強度的可行性。研究結果表明：不同尺寸和形狀試件的抗壓強度存在線性相關性，且強度修正系數宜根據強度等級予以分段考慮；圓柱體試件的抗壓強度普遍低于立方體試件；摻與不摻鋼纖維對抗壓強度尺寸效應影響較大。 Abstract: Size effects of compressive strength ultra-high performance steel fiber reinforced concrete and ultra-high performance concrete(UHPSFRC/UHPC) with three mixtures were investigated, the influence of size and shape of specimen, curing condition, and testing age on the compressive strength was analyzed, and the feasibility of testing the compressive strength of UHPSFRC/UHPC with small-sized specimens instead of standard specimens was discussed. The results show that compressive strength of specimens with different shape and size are linearly correlated each other, and the correction of compressive strength should be segmented in terms of strength class. With the similar length of width/diameter, the strength of cylinders is higher than that of cubes. The size effect of compressive strength is greatly influenced by steel fiber.

江晨暉,周堂貴,王利強,等.鋼纖維增強超高性能混凝土抗壓強度尺寸效應研究[J].混凝土與水泥制品,2020(8):43-47. JIANG C H,ZHOU T G,WANG L Q,et al.Size Effects of Compressive Strength of Ultra-high Performance Steel Fiber Reinforced Concrete[J].China Concrete and Cement Products,2020(8):43-47.

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