纖維水泥及制品_2021_《混凝土與水泥制品》雜志社

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纖維水泥及制品

高性能纖維增強水泥基復合材料及其墻材制品性能試驗研究

麻鵬飛，程寶軍，高育欣，康升榮，涂玉林

2021年第7期

摘要

引用本文

摘 ? 要：制備了一種以高性能纖維增強水泥基復合材料為殼體、泡沫混凝土為芯體的新型復合墻板，并對其力學性能、熱工性能進行了研究。結果表明：隨著纖維摻量的增加，復合墻板的3 d、7 d和28 d抗折強度明顯增加，7 d和28 d抗折強度均能達到20 MPa以上，極限抗彎荷載系數為9.0；空心墻板的力學性能與復合墻板基本一致；空心墻板的傳熱系數較高，為3.20 W/（m2·K），復合墻板的傳熱系數最低，為0.82 W/（m2·K）。 Abstract: A new type of composite wallboard with high-performance fiber reinforced cement-based composite materials as the shell and foamed concrete as the core was prepared, and its mechanical and thermal properties were studied. The results show that with the increase of fiber content, the 3 d, 7 d and 28 d flexural strength of the composite wallboard obviously increase, and the 7 d and 28 d flexural strength can reach more than 20 MPa, and the ultimate flexural load coefficient is 9.0. The mechanical properties of hollow wallboard and composite wallboard are basically identical. The heat transfer coefficient of hollow wallboard is higher, which is 3.20 W/（m2·K）, and the heat transfer coefficient of composite wallboard is the lowest, which is 0.82 W/（m2·K）. ?

麻鵬飛,程寶軍,高育欣,等.高性能纖維增強水泥基復合材料及其墻材制品性能試驗研究[J].混凝土與水泥制品,2021(7):47-51. MA P F,CHENG B J,GAO Y X,et al.Experimental Study on Properties of High-performance Fiber Reinforced Cement-based Composites and Wall Products[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):47-51.

硫酸鹽與凍融環境下鋼纖維橡膠混凝土的劣化規律研究

姜磊1，魏穎旗2，張明1，楊玉東1

2021年第7期

摘要

引用本文

摘 ? 要：通過快速凍融試驗，測試了不同凍融循環次數后鋼纖維橡膠混凝土的質量、相對動彈性模量、抗壓強度及損傷層厚度，研究了硫酸鹽與凍融環境下鋼纖維橡膠混凝土的劣化規律與損傷機理。結果表明：鋼纖維橡膠混凝土在硫酸鹽溶液中的凍融損傷小于未摻鋼纖維的橡膠混凝土；鋼纖維橡膠混凝土的劣化程度隨鋼纖維摻量的增加逐漸減小，但當鋼纖維摻量為2.0%時，劣化程度明顯增大；損傷層厚度可以表征鋼纖維橡膠混凝土的內部損傷，隨損傷層厚度增加，損傷層混凝土的抗壓強度損失明顯；硫酸鹽與凍融環境下鋼纖維橡膠混凝土的抗壓強度與損傷層抗壓強度存在相關性，根據劣化后鋼纖維橡膠混凝土的抗壓強度可計算出損傷層抗壓強度。 Abstract：Through the freeze-thaw tests, the weight, relative dynamic elastic modulus, compressive strength and damage layer thickness of steel fiber reinforced rubber concrete(SFRRC) after different freeze-thaw cycles were tested. The deterioration law and damage mechanism of SFRRC under sulfate and freeze-thaw environment were studied. The results show that the freeze-thaw damage of SFRRC in sulfate solution is less than that of rubber concrete without steel fiber. The deterioration degree of SFRRC decreases with the increase of steel fiber content, but the deterioration degree of SFRRC increases obviously when steel fiber content is 2.0%. The damage layer thickness can be used to characterize the internal damage of SFRRC. With the increase of damage layer thickness, the compressive strength loss of damaged layer concrete is obviously. There is a correlation between the compressive strength of SFRRC and the compressive strength of damaged layer under sulfate and freeze-thaw environment. According to the compressive strength of deteriorated SFRRC, the compressive strength of damaged layer can be calculated.

姜磊，魏穎旗，張明,等.硫酸鹽與凍融環境下鋼纖維橡膠混凝土的劣化規律研究[J].混凝土與水泥制品,2021(7):52-56,62. JIANG L,WEI Y Q,ZHANG M,et al.Damage Degradation Law of Steel Fiber Reinforced Rubber Concrete in Sulfate Solution and Freeze-thaw Environment[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):52-56,62.

橡膠纖維混凝土多指標配合比優化試驗研究

劉長順1,2，張景奎2，鄭繼1,2，楊志1

2021年第7期

摘要

引用本文

摘 ? 要：基于不同的統計方法，研究了聚丙烯纖維摻量、橡膠摻量、橡膠顆粒粒徑對混凝土各項指標（28 d強度、脆性、抗裂性能、抗滲性能）的影響。結果表明：當影響各指標的主次因素不一致，顯著性不完全相同時，僅采用極差、方差分析法無法確定多指標橡膠纖維混凝土的最優配合比；采用綜合平衡法雖然可以得出最優配合比，但該方法主觀性強、分析復雜、實施困難；采用層次分析法時，所得結果與綜合平衡法一致，且層次分析法相比于綜合平衡法具有計算分析簡單、結果客觀準確等優點；橡膠纖維混凝土的最優配合比為0.9 kg/m3聚丙烯纖維+10%粒徑2 mm的橡膠顆粒。 Abstract: Based on different statistical methods, the effects of polypropylene fiber content, rubber content and rubber particle size on the concrete indexes (28 d strength, brittleness, crack resistance and impermeability) were studied. The results show that when the primary and secondary factors affecting each index are not consistent, and the significance is not completely the same, only using range and variance analysis method can not determine the optimal mix proportion of rubber fiber reinforced concrete with multi indexes. Although the comprehensive balance method can be used to obtain the optimal mix proportion, it is subjective, complex and difficult to implement. Compared with the comprehensive balance method, the analytic hierarchy process has the advantages of simple calculation and accurate results. The optimal mix proportion of rubber fiber reinforced concrete is 0.9 kg/m3 polypropylene fiber+10% rubber with particle size of 2 mm.

劉長順,張景奎,鄭繼,等.橡膠纖維混凝土多指標配合比優化試驗研究[J].混凝土與水泥制品,2021(7):57-62. LIU C S,ZHANG J K,ZHENG J,et al.Experimental Study on Multi Index Mix Proportion Optimization of Rubber Fiber Reinforced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):57-62.

高溫后PVA-玄武巖混雜纖維高性能混凝土力學性能試驗研究

陳晨，張曉東，李曈，范錦澤

2021年第7期

摘要

引用本文

摘 ? 要：研究了玄武巖纖維摻量、PVA纖維摻量以及礦渣微粉摻量對高溫后PVA-玄武巖混雜纖維高性能混凝土（HFHPC）抗壓強度和抗折強度的影響。結果表明：200 ℃時，試件的抗壓強度有所提高，抗折強度變化不明顯，200 ℃后，試件的強度隨溫度的升高而降低；與素混凝土相比，HFHPC的強度殘余率更高；隨著玄武巖纖維摻量、PVA纖維摻量的增加，試件強度逐漸增大；10%礦渣微粉對強度的提高貢獻最大，摻量大于20%時強度明顯減小。 Abstract: The effects of basalt fiber content, PVA fiber content and slag powder content on the compressive strength and flexural strength of PVA-basalt hybrid fiber high performance concrete (HFHPC) after high temperature were studied. The results show that the compressive strength of the specimen increases at 200 ℃, but the flexural strength does not change significantly. After 200 ℃, the strength of the specimen decreases with the increase of temperature. The residual strength rate of HFHPC is higher than that of plain concrete. With the increase of basalt fiber content and PVA fiber content, the strength of the specimen increases gradually. 10% slag powder has the greatest improvement on the strength of the HFHPC, but the strength decreases obviously when the content is more than 20%.

陳晨,張曉東,李曈,等.高溫后PVA-玄武巖混雜纖維高性能混凝土力學性能試驗研究[J].混凝土與水泥制品,2021(7):63-66,75. CHEN C,ZHANG X D,LI T,et al.Experimental Study on Mechanical Properties of PVA-basalt Hybrid Fiber High Performance Concrete After High Temperature[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):63-66,75.

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