房建材料及制品_2021_《混凝土與水泥制品》雜志社

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房建材料及制品

不同裂縫尺度下無機輕骨料砂漿外墻外保溫系統溫度場分析

田靜靜1，袁克龍1，熊厚仁2，鄭豪2

2021年第4期

摘要

引用本文

摘 ? 要：研究了不同裂縫尺度下無機輕骨料砂漿外墻外保溫系統的溫度場變化情況，對含預制裂縫寬度為0.05 mm、0.10 mm、0.20 mm、0.30 mm、0.40 mm和0.50 mm的試件進行了160次熱雨循環試驗，測量了不同裂縫尺度下試件的溫度值，分析了各階段的溫度場變化規律。結果表明：與無裂縫情況下相比，試件預制裂縫對基墻溫度的變化有一定影響；系統的熱物理性能隨熱雨循環次數的增加而逐漸劣化，裂縫寬度對保溫層溫度的變化影響很小，僅會對基墻的溫度造成一定影響；當裂縫較寬時，基墻將在升溫階段達到較高的溫度。 Abstract: The temperature change in the external thermal insulation composite systems of inorganic lightweight aggregate mortar (ETICS-ILAM) containing different crack scales was studied. 160 times of hot rain cycles were carried out on ETICS-ILAM specimens with prefabricated crack widths of 0.05 mm, 0.10 mm, 0.20 mm, 0.30 mm, 0.40 mm and 0.50 mm. The temperature values of the specimens with different crack sizes were measured, and the variation law of the temperature field in each stage was analyzed. The results show that the prefabricated cracks in the specimens have a certain influence on the temperature change in the base-wall. The thermal physical properties of the system gradually deteriorate with the increase of the number of heat-rain cycles. The crack width has little influence on the temperature change in the insulation layer, but has noticeable influence on the temperature in the base-wall. When the crack has a relatively bigger width, the temperature in the base-wall can reach a relatively higher value during the temperature increasing stage.?

田靜靜,袁克龍,熊厚仁,等.不同裂縫尺度下無機輕骨料砂漿外墻外保溫系統溫度場分析[J].混凝土與水泥制品,2021(4):69-73. TIAN J J,YUAN K L,XIONG H R,et al.Analysis on Temperature Field of External Thermal Insulation Composite Systems of Inorganic Lightweight Aggregate Mortar with Different Crack Scales[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):69-73.

自密實陶粒泡沫混凝土墻板生產試驗研究

張珍杰1，王東明1，王可2，鄒定華1

2021年第4期

摘要

引用本文

摘 ? 要：為了獲得合適的陶粒泡沫混凝土墻板生產工藝參數，進行了自密實陶粒泡沫混凝土墻板工廠生產試驗。結果表明：混凝土的坍落擴展度是生產中的關鍵參數，當其達到SF1級自密實混凝土性能要求時，所生產墻板的完整性好，但是表面缺陷較多；而達到SF2級自密實混凝土性能要求時，所生產墻板的質量好，表面缺陷少；混凝土的工作性越好，累計破泡率越小。 Abstract: In order to obtain appropriate production technology parameters of ceramist foam concrete wall panels, the factory production tests of self-compacting ceramsite foam concrete wall panels in production were carried out. The results show that the slump flow of concrete is the key parameter in production, and when it meets the requirement of class SF1 self-compacting concrete, the integrity of wall panels is good, but there are many surface defects. When it meets the requirement of class SF2 self-compacting concrete, the quality of wall panels is good and the surface defects are less. The better the workability of concrete, the smaller the cumulative bubble breaking rate.

張珍杰,王東明,王可,等.自密實陶粒泡沫混凝土墻板生產試驗研究[J].混凝土與水泥制品,2021(4):74-77. ZHANG Z J,WANG D M,WANG K,et al.Research on Production Test of Self-compacting Ceramist Foam Concrete Wall Panels[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):74-77.

CFRP板加固高強混凝土梁試驗研究

韓艷，王龍龍

2021年第4期

摘要

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摘 ? 要：通過三點彎曲試驗，并利用CCD相機及數字散斑分析技術研究了CFRP板裂縫擴展至破壞的全過程。結果表明：各因素對試件承載力的影響程度從大到小依次為CFRP板厚、加載速率、裂縫深度、混凝土強度；粘貼CFRP板的高強混凝土試件破壞是由混凝土剪切破壞引起的CFRP板粘貼膠層與混凝土之間的界面剝離破壞，其從裂縫開始擴展到完全破壞的時間明顯長于未粘貼CFRP板的試件；黏結界面仍是外粘CFRP板加固高強混凝土構件的薄弱部位。 Abstract: The whole process of the specimens from crack propagation to destruction was studied through the three-point bending test, and the CCD camera observation system and digital speckle analysis technology were used. The test results show that the order of influence factors on the bearing capacity of the high-strength concrete specimens is CFRP plate thickness, loading rate, depth of the pre-crack and the concrete strength. The failure of high-strength concrete specimens reinforced with external CFRP plates is the interface peeling damage between the CFRP plates adhesive layer and the concrete caused by the shear failure of the concrete, and the time from crack propagation to complete failure is significantly longer than that of the specimens without CFRP reinforcement. The bonding interface is still the weak part of the high-strength concrete members reinforced by externally bonding CFRP plates.

韓艷,王龍龍.CFRP板加固高強混凝土梁試驗研究[J].混凝土與水泥制品,2021(4):78-82. HAN Y,WANG L L.Experimental Study on Strengthening High-strength Concrete Beam with CFRP Plates[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):78-82.

國外蒸壓加氣混凝土板式承重墻研究現狀

李欣憶1，王昊2，任寶雙2，初明進1，陳國堯1，李祥賓1

2021年第4期

摘要

引用本文

摘 ? 要：與蒸壓加氣混凝土砌塊墻相比，蒸壓加氣混凝土配筋墻板對低層建筑可不設置構造柱，混凝土現場澆筑量小、構件尺寸大的特點使其組裝更高效。本文介紹了蒸壓加氣混凝土板式承重墻結構在國外的應用情況，結合已有研究成果和相關技術規范對該結構的力學性能進行了說明，并展望了該結構體系的應用前景。研究表明：蒸壓加氣混凝土板式承重墻的抗震性能良好，結構在設防烈度下可以保持預屈服狀態，在大震作用下具有充分的強度儲備。 Abstract: Compared with autoclaved aerated concrete block wall, autoclaved aerated concrete panel wall of low-rise buildings has no need to composite with constructional column. Small quantity of concrete pouring and large component size make its assembly more efficient. The application of autoclaved aerated concrete load bearing panel wall structure abroad is introduced, and the mechanical properties of the structure according to the research results and relevant design codes are reviewed. Researches indicate that autoclaved aerated concrete load bearing panel wall has good seismic performance. The wall behaves in its pre-yield region under the seismic fortification intensity, and has sufficient strength reservation in strong earthquake. In conclusion, the application of autoclaved aerated concrete load bearing panel wall structure is prospected.

李欣憶,王昊,任寶雙,等.國外蒸壓加氣混凝土板式承重墻研究現狀[J].混凝土與水泥制品,2021(4):83-87. LI X Y,WANG H,REN B S,et al.Research Status in Autoclaved Aerated Concrete Load Bearing Panel Walls Abroad[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):83-87.

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