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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    房建材料及制品

    碳纖維網與短切絲協同增強混凝土梁試驗研究
    碳纖維網與短切絲協同增強混凝土梁試驗研究
    • 雷小磊,黃國棟,崔玉龍
    2021年第1期
    摘要
    引用本文
    摘 ? 要:分析了碳纖維網的密度、層數與預埋位置以及碳纖維短切絲的長度與摻量對混凝土梁抗折性能的影響。結果表明:預埋碳纖維網與摻入碳纖維短切絲均能顯著提升混凝土梁的抗折性能;碳纖維網密度為20 mm×20 mm時,距混凝土梁上表面125 mm時的增強效果最佳;雙層碳纖維網的增強效果明顯優于單層碳纖維網;同時摻入碳纖維短切絲可繼續提升混凝土梁的抗折性能,且摻量2%、長度6 mm的碳纖維短切絲提升效果最佳。 Abstract: The weakness of flexural and crack resistance has seriously affected the wide application of concrete in engineering. The influence of the density, the number of layers and the embedded position of carbon fiber mesh, and the length and content of carbon fiber short-cut wire on the flexural performance of concrete beams were analyzed. The results show that both the embedded carbon fiber mesh and the incorporation of carbon fiber short-cut wire can significantly improve the flexural performance of concrete beams. When the density of carbon fiber mesh is 20 mm× 20 mm, the reinforcement effect is the best when it is 125 mm away from the upper surface of the concrete beam. The reinforcement effect of adding double carbon fiber mesh is better than that of single layer. At the same time, adding carbon fiber short-cut wire can continue to improve the flexural performance of concrete beam, and 2% content of carbon fiber short-cut wire with the length of 6 mm is the best.
    雷小磊,黃國棟,崔玉龍.碳纖維網與短切絲協同增強混凝土梁試驗研究[J].混凝土與水泥制品,2021(1):61-66. LEI X L,HUANG G D,CUI Y L.Experimental Study on Reinforced Concrete Beam with Carbon Fiber Mesh and Short-cut Wire[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):61-66.
    鋼板-超高性能混凝土梁有限元分析研究
    鋼板-超高性能混凝土梁有限元分析研究
    • 趙 明1,黃飛新1,劉瓊偉2,邱明紅2,黃 政2,胡偉業2,邵旭東2
    2021年第1期
    摘要
    引用本文
    摘 ? 要:為了研究鋼板-超高性能混凝土(UHPC)組合梁的抗彎性能,在鋼板-UHPC-T組合梁方案下,以鋼板厚度、鋼板強度等級、UHPC抗拉強度和UHPC極限拉應變為參數,利用ABAQUS軟件進行了有限元分析。結果表明:鋼板厚度和鋼板強度等級的改變對組合梁抗彎承載力的提高作用較為明顯;UHPC抗拉強度的提高可以適當提高開裂荷載;UHPC極限拉應變的增加可適當提高梁體的延性。 Abstract: In order to study the flexural performance of steel plate-ultra-high performance concrete(UHPC) composite beams, under the plan of steel plate-UHPC-T composite beams, the finite element analysis was carried out with ABAQUS finite element analysis software, taking steel plate thickness, steel plate strength grade, UHPC tensile strength and UHPC ultimate tensile strain as parameters. The results show that the change of steel plate thickness and steel plate strength grade have obvious effects on the improvement of the flexural bearing capacity of composite beams. The increase of UHPC tensile strength can appropriately increase the cracking load, and the increase of UHPC ultimate tensile strain can appropriately improve the ductility of the beam.
    趙明,黃飛新,劉瓊偉,等.鋼板-超高性能混凝土梁有限元分析研究[J].混凝土與水泥制品,2021(1):67-71. ZHAO M,HUANG F X,LIU Q W,Finite Element Analysis of Steel Plate-ultra-high Performance Concrete Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):67-71.
    裝配式大板結構老舊住宅樓的修復加固研究
    裝配式大板結構老舊住宅樓的修復加固研究
    • 厲見芬1,李書進1,肖耀軍2
    2021年第1期
    摘要
    引用本文
    摘 ? 要:以常州市某老舊小區的28棟裝配式大板結構住宅樓為例,在原結構存在缺陷和工程造價、施工工期、對住戶的影響等多重技術難題條件下,基于房屋滲漏現狀和檢測報告,進行了原因分析,提出了合理的修復加固方案。研究成果對類似老舊小區的綜合性能提升和改造關鍵技術有一定的參考價值。 Abstract: Taking 28 residential buildings with prefabricated large panel structure in an old residential in Changzhou as an example, and considering multiple technical problems such as defects of original structure, project cost, construction period and impact on households, based on housing leakage status and inspection report, the causes are analyzed, and reasonable restoration and reinforcement program is put forward. The research results have a certain reference value for the improvement of comprehensive performance and the key technology of transformation in similar old residential areas.
    厲見芬,李書進,肖耀軍.裝配式大板結構老舊住宅樓的修復加固研究[J].混凝土與水泥制品,2021(1):72-74,79. LI J F,LI S J,XIAO Y J.Research on Restoration and Reinforcement of Old Residential Buildings with Prefabricated Large Panel Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):72-74,79.
    可再分散乳膠粉及?;⒅閷ε菽炷列阅艿挠绊? />
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                          <a href="/product/3457.html" target="_parent" class="title"><i class="iconfont12"></i>可再分散乳膠粉及?;⒅閷ε菽炷列阅艿挠绊?/a>
                        
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                                      <span class="attrValue"><i class="iconfont2"></i> 馬建斌</span>
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                                      <span class="attrValue"> 2021年第1期</span>
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                            <div class="zhai"><i class="iconfont11"></i>摘要</div>
                            <div class="zhai1"><i class="iconfont11"></i>引用本文</div>
                            <span class="newMs">摘 ? 要:泡沫混凝土(FC)作為一種輕質多孔材料具有優良的保溫隔熱效果,將其用作建筑保溫墻體材料可以有效降低建筑能耗。利用可再分散乳膠粉(RDL)和?;⒅椋℅B)改性FC,研究了RDL和GB單獨取代以及RDL和GB共同取代快硬硫鋁酸鹽水泥對FC干密度、抗壓強度、導熱系數和拉伸黏結強度的影響。結果表明:RDL可以顯著提高FC的拉伸黏結強度,GB可以顯著降低FC的干密度和導熱系數;RDL和GB共同取代水泥時更有利于改善FC的綜合性能;RDL和GB總摻量為3%時改善效果最佳, 此時FC的干密度為311.7 kg/m3,抗壓強度為0.42 MPa,導熱系數為0.078 3 W/(m·K),拉伸黏結強度為0.113 9 MPa。

Abstract: As a kind of lightweight porous material, foam concrete(FC) has excellent thermal insulation effect and can be used as building insulation wall material to effectively reduce building energy consumption. Using redispersible latex powder(RDL) and glass beads(GB) to modify FC, and the effect of RDL and GB alone substitution and RDL and GB joint substitution of rapid hardening sulphoaluminate cement on the dry density, compressive strength, thermal conductivity and tensile bond strength of FC were explored. The results show that RDL can significantly improve tensile bond strength of FC, and GB can significantly reduce dry density and thermal conductivity of FC. When RDL and GB replace cement together, it is more conducive to improve the comprehensive performance of FC. The improvement effect is best when the total content of RDL and GB is 3%. At this time, the dry density, compressive strength, thermal conductivity and tensile bond strength of FC are 311.7 kg/m3, 0.42 MPa, 0.078 3 W/(m·K), and 0.113 9 MPa, respectively.
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                                      <span class="attrValue3"> 馬建斌.可再分散乳膠粉及?;⒅閷ε菽炷列阅艿挠绊慬J].混凝土與水泥制品,2021(1):75-79.
MA J B.Influence of Redispersible Latex Powder and Glass Beads on the Properties of Foam Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(1):75-79.</span>
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