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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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    第七期

    核電工程用大摻量礦物摻合料高性能混凝土試驗研究
    核電工程用大摻量礦物摻合料高性能混凝土試驗研究
    • 劉向坤,胡德華,張 偉,涂 濤
    2022年第7期
    摘要
    引用本文
    摘 ? 要:在礦物摻合料總摻量35%~60%和水膠比0.42~0.29的情況下,采用粉煤灰、礦粉復摻,設計了系列大摻量礦物摻合料高性能混凝土(HPC)配合比,試驗研究了礦物摻合料摻量、水膠比對HPC坍落度、抗壓強度、抗碳化性能、抗氯離子滲透性能、早期收縮性能的影響。結果表明:礦物摻合料可顯著改善HPC的性能,且隨著水膠比的降低,礦物摻合料對HPC性能的改善效果更顯著;所制備的大摻量礦物摻合料HPC具有良好的技術可行性,滿足相關核電工程設計要求。 Abstract: With total percentage of mineral admixture of 35%~60% and water-binder ratio of 0.42~0.29, the high-performance concrete was made blending with fly ash and slag. The effects of mineral admixture content and water-binder ratio on slump, compressive strength, chloride ion penetration resistance, carbonation resistance, and early shrinkage properties of concrete were studied. The results show that the properties of HPC can be significantly improved by blending with mineral admixture, and with reduction of water-binder ratio, the affection is more significantly. The prepared HPC with large percentage of mineral admixture has good technical feasibility and meets the design requirements of nuclear power projects.
    劉向坤,胡德華,張偉,等.核電工程用大摻量礦物摻合料高性能混凝土試驗研究[J].混凝土與水泥制品,2022(7):83-86. LIU X K,HU D H,ZHANG W,et al.Study on High-performance Concrete with Large Percentage of Mineral Admixture in Nuclear Power Projects[J].China Concrete and Cement Products,2022(7):83-86.
    再生微粉泡沫混凝土的配合比設計
    再生微粉泡沫混凝土的配合比設計
    • 謝洪陽1,董建軍1,戴宜文1,鄧 勇1,鄧明偉2
    2022年第7期
    摘要
    引用本文
    摘 ? 要:通過正交試驗研究了氣泡群摻量、再生微粉摻量、水料比和羥丙基甲基纖維素醚(HPMC)摻量對再生微粉泡沫混凝土性能的影響,并結合功效系數法確定了再生微粉泡沫混凝土的最優配合比。采用SEM和XRD探究了再生微粉泡沫混凝土的微觀結構。結果表明:再生微粉泡沫混凝土的抗壓強度隨著氣泡群摻量、再生微粉摻量的增加呈下降趨勢,隨著水料比的增加呈先上升后下降的趨勢,隨著HPMC摻量的增加呈上升趨勢;再生微粉泡沫混凝土的最優配合比為氣泡群摻量4%、再生微粉摻量30%、水料比0.6、HPMC摻量0.07%;再生微粉泡沫混凝土抗壓強度的提升主要歸因于孔隙細化和HPMC減少了連通孔的產生。 Abstract: The effects of bubbles content, recycled micropowder content, water-material ratio and HPMC content on the properties of foamed concrete with recycled micropowder were studied by orthogonal test, and the optimal mix proportion was determined combined with the efficacy coefficient method. The microstructure of foamed concrete with recycled micropowder was investigated by SEM and XRD. The results show that the compressive strength of foamed concrete with recycled micropowder decreases with the increase of the content of bubbles and recycled micropowder, increases first and then decreases with the increase of the water-material ratio, and increases with the increase of the content of HPMC. The optimal mix proportion of foamed concrete with recycled micropowder is 4% of bubbles, 30% of recycled micropowder, 0.6 of water-material ratio and 0.07% of HPMC. The improvement of the compressive strength of foamed concrete with recycled micropowder is mainly attributed to the pore refinement and HPMC reducing the generation of connected pores.
    謝洪陽,董建軍,戴宜文,等.再生微粉泡沫混凝土的配合比設計[J].混凝土與水泥制品,2022(7):87-91. XIE H Y,DONG J J,DAI Y W,et al.Mix Proportion Design of Foamed Concrete with Recycled Micropowder[J].China Concrete and Cement Products,2022(7):87-91.
    再生細骨料的級配優化及對混凝土性能的影響
    再生細骨料的級配優化及對混凝土性能的影響
    • 艾洪祥1,劉 洋1,盧 霄1,李紹純2,鄭???,馬旭東1
    2022年第7期
    摘要
    引用本文
    摘 ? 要:研究了再生細骨料的摻量和顆粒級配對混凝土工作性、力學性能、抗凍性能和耐久性能的影響。結果表明:再生細骨料的最佳摻量為20%,此時,混凝土的工作性和力學性能較好;采用再生細骨料(Ⅱ區粗砂)等質量替代20%天然砂配制的混凝土工作性、力學性能較優,其28 d抗壓強度相比于采用天然砂的基準組提高了9%,且其抗凍性能、耐久性能與采用天然砂配制的混凝土相近。 Abstract: The effects of the content and particle gradation of recycled fine aggregate on the workability, mechanical properties, frost resistance and durability of concrete were studied. The results show that the optimum content of recycled fine aggregate is 20%, and the workability and mechanical properties of concrete are better. The concrete prepared with recycled fine aggregate (coarse sand in zone Ⅱ) instead of 20% natural sand has better workability and mechanical properties, and its 28 d compressive strength is 9% higher than that of the reference group with natural sand, and its frost resistance and durability are similar to those of the concrete prepared with natural sand.
    艾洪祥,劉洋,盧霄,等.再生細骨料的級配優化及對混凝土性能的影響[J].混凝土與水泥制品,2022(7):92-96. AI H X,LIU Y,LU X,et al.Gradation Optimization of Recycled Fine Aggregate and Its Influence on the Properties of Concrete[J].China Concrete and Cement Products,2022(7):92-96.
    廢玻璃粉活性激發及對砂漿性能的影響
    廢玻璃粉活性激發及對砂漿性能的影響
    • 岳 龍,季 濤,周鈺鑫,王 晟,蔣銘昊,符 濤,張士萍
    2022年第7期
    摘要
    引用本文
    摘 ? 要:采用堿激發劑和鹽激發劑激發廢玻璃粉的活性,研究了活性激發前后廢玻璃粉對砂漿ASR膨脹和強度的影響。結果表明:未活性激發時,當廢玻璃粉的取代率為10%時,砂漿的抗折強度和膨脹率均優于基準組;堿激發劑可有效侵蝕廢玻璃粉,產生活性SiO2,但堿過量會引起堿骨料反應的發生,降低砂漿的強度和耐久性;鹽激發劑既能促進廢玻璃粉中活性SiO2的釋放,又能生成鈣礬石,提高基體密實度,但摻量過高會造成鈣礬石過量,導致基體結構疏松,從而降低砂漿的強度和耐久性。 Abstract: The activity of waste glass powder was stimulated by alkali activator and salt activator, and the effect of waste glass powder before and after activation on the ASR expansion and strength of mortar was studied. The results show that when the replacement rate of waste glass powder without active excitation is 10%, the flexural strength and expansion rate of mortar are better than those of the reference group. Alkali activator can effectively erode waste glass powder and generate active SiO2, but excessive alkali will cause alkali-aggregate reaction and reduce the strength and durability of mortar. Salt activator can not only promote the release of active SiO2 in waste glass powder, but also generate ettringite and improve the compactness of the matrix, but excessive salt activator will cause excessive ettringite, resulting in loose matrix structure, thereby reducing the mortar strength and durability.
    岳龍,季濤,周鈺鑫,等.廢玻璃粉活性激發及對砂漿性能的影響[J].混凝土與水泥制品,2022(7):97-100. YUE L,JI T, ZHOU Y X,et al.Active Excitation of Waste Glass Powder and Its Effect on the Properties of Mortar[J].China Concrete and Cement Products,2022(7):97-100.
    堿激發礦渣砂漿的介質傳輸性能研究
    堿激發礦渣砂漿的介質傳輸性能研究
    • 羅具乾1,萬小梅1,2,王 騰3,于 琦1,3,徐培蓁1,曾云輝1,劉 杰1
    2022年第7期
    摘要
    引用本文
    摘 ? 要:通過鹽池浸泡試驗研究了非飽和條件下堿激發礦渣砂漿的介質傳輸機理,分析了不同激發劑和粉煤灰摻量對堿激發礦渣砂漿中水分和氯離子傳輸性能的影響。結果表明:水玻璃激發礦渣砂漿的毛細吸水系數較小,強度較高;非飽和條件下,堿激發礦渣砂漿的氯離子傳輸性能顯著低于普通水泥砂漿;水玻璃激發礦渣砂漿的表觀氯離子擴散系數較NaOH激發礦渣砂漿略高。 Abstract: The medium transmission mechanism of alkali activated slag mortar under unsaturated condition was studied by salt pool immersion test, and the effects of different activators and fly ash contents on the moisture and chloride ion transport performance of alkali activated slag mortar were analyzed. The results show that the capillary water absorption coefficient of slag mortar activated by water glass is small and the strength is high. Under the unsaturated conditions, the chloride ion transport performance of alkali activated slag mortar is lower than that of ordinary cement mortar. The apparent chloride ion transport coefficient of slag mortar activated by water glass is slightly higher than that of slag mortar activated by NaOH.
    羅具乾,萬小梅,王騰,等.堿激發礦渣砂漿的介質傳輸性能研究[J].混凝土與水泥制品,2022(7):101-104. LUO J Q,WAN X M,WANG T,et al.Study on Medium Transmission Performance of Alkali Activated Slag Mortar[J].China Concrete and Cement Products,2022(7):101-104.
    GFRP增強海水海砂混凝土柱軸壓性能研究
    GFRP增強海水海砂混凝土柱軸壓性能研究
    • 李佳敏a,楊樹桐b,劉 暢b
    2022年第7期
    摘要
    引用本文
    摘 ? 要:研究了GFRP縱筋與GFRP箍筋共同作用、GFRP管與GFRP筋共同作用對海水海砂混凝土(SSC)柱軸壓性能的影響。結果表明:隨著GFRP縱筋配筋率的增加,SSC柱的極限承載力相比對照組提高了4.3%~49.8%;采用GFRP管與GFRP筋共同增強后,SSC柱的承載力和延性進一步提高,試件破壞后整體形狀完整,破壞形式得到了改善。 Abstract: The effects of the interaction of GFRP longitudinal bar and GFRP stirrup and the interaction of GFRP pipe and GFRP bar on the axial compressive behavior of seawater sea sand concrete(SSC) columns were studied. The results show that with the increase of GFRP longitudinal bar ratio, the ultimate bearing capacity of SSC column increases by 4.3%~49.8% compared with the control group. The bearing capacity and ductility of SSC column are further improved after GFRP pipe and GFRP bar are used, and the overall shape of the specimen after failure is complete and the failure form is improved.
    李佳敏,楊樹桐,劉暢.GFRP增強海水海砂混凝土柱軸壓性能研究[J].混凝土與水泥制品,2022(7):69-73,79. LI J M,YANG S T,LIU C.Study on Axial Compressive Behavior of Seawater Sea Sand Concrete Columns Reinforced with GFRP[J].China Concrete and Cement Products,2022(7):69-73,79.
    裝配式鋼骨增強微孔混凝土復合樓板力學性能試驗研究
    裝配式鋼骨增強微孔混凝土復合樓板力學性能試驗研究
    • 王洪鎮1,王海瑞1,蘇明明2,馬得俊2,馬 壽2,馬亮亮3
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為研究實際工程中裝配式鋼骨增強微孔混凝土復合樓板的承載能力,通過靜載試驗,得到了其荷載-撓度曲線和裂縫長期發展特征,并對該復合樓板進行了配筋計算、裂縫寬度和撓度驗算。此外,采用有限元軟件MARC對復合樓板進行了受力分析,并與試驗結果進行了對比,發現兩者吻合程度較高。研究結果可為相關復合樓板的設計提供參考。 Abstract: In order to study the bearing capacity of prefabricated steel reinforced microporous concrete composite floor slabs in practical engineering, the loading-deflection relationship and the long-term crack development characteristics of the composite floor slabs were obtained by static loading test. The reinforcement calculation, crack width and deflection checking ?calculation were carried out. The finite element software MARC was used to analyze the stress state of the composite structure slabs, and the results were compared with the test results. The results show that the stress states of theoretical calculation and simulation analysis are quite consistent, which provides a reference for the design of composite structure slabs.
    王洪鎮,王海瑞,蘇明明,等.裝配式鋼骨增強微孔混凝土復合樓板力學性能試驗研究[J].混凝土與水泥制品,2022(7):74-79. WANG H Z,WANG H R,SU M M,et al.Experimental Study on Mechanical Properties of Prefabricated Steel Reinforced Microporous Concrete Composite Floor Slabs[J].China Concrete and Cement Products,2022(7):74-79.
    添加纖維材料的混凝土預制復合墻體應用分析
    添加纖維材料的混凝土預制復合墻體應用分析
    • 張亞東1,段宜棟2,梁美清3
    2022年第7期
    摘要
    引用本文
    摘 ? 要:采用MATLAB軟件中的識別圖像控制技術,對典型混凝土圖像數據進行處理,還原了混凝土中骨料的真實排布情況,同時,探究了基于裝配式預制部品部件的保溫一體化復合墻體的新型構造形式。結果表明:在混凝土中添加纖維材料可有效控制復合墻體的開裂問題;采用外葉板+保溫板+內葉墻的“夾心保溫三明治板”構造形式可有效解決裝配式建筑底部加強區所用墻體超寬、超高及外窗開洞存在的問題。 Abstract: Using the recognition image control technology in MATLAB software, the typical concrete image data were processed to restore the real arrangement of aggregate in concrete. At the same time, the new structural form of thermal insulation integratedcomposite wall based on prefabricated components was explored. The results show that adding fiber materials to concrete can effectively control the cracking of composite wall. The structural form of "sandwich thermal insulation sandwich plate" with outer leaf plate and thermal insulation plate and inner leaf wall can effectively solve the existing thorny problems of super width, super height and additional window holes of the wall used in the bottom reinforcement area of prefabricated buildings.
    張亞東,段宜棟,梁美清.添加纖維材料的混凝土預制復合墻體應用分析[J].混凝土與水泥制品,2022(7):80-82. ZHANG Y D,DUAN Y D,LIANG M Q.Structural Analysis of Precast Concrete Composite Wall with Fiber Materials[J].China Concrete and Cement Products,2022(7):80-82.
    堿化稻草纖維對尾砂充填體力學性能的影響
    堿化稻草纖維對尾砂充填體力學性能的影響
    • 張 競,李 駿
    2022年第7期
    摘要
    引用本文
    摘 ? 要:將經過濃度為4%的NaOH溶液堿化處理過的稻草纖維作為加筋材料用于尾砂充填體試件的制備,研究了灰砂比、堿化稻草纖維的長度和摻量對尾砂充填體試件抗壓強度的影響,并借助掃描電鏡(SEM)從微觀角度分析了堿化稻草纖維的作用機理。結果表明:隨著堿化稻草纖維摻量的增加,試件的抗壓強度下降;隨著堿化稻草纖維長度的增加,試件的抗壓強度先增大后減??;未堿化稻草纖維對試件抗壓強度的降低程度顯著大于堿化稻草纖維;隨著灰砂比的減小,試件的抗壓強度降低。 Abstract: The straw fiber alkalized by 4% NaOH solution was used as reinforcement material for the preparation of tailings backfill specimens. The effects of cement-sand ratio, length and content of alkalized straw fiber on the compressive strength of tailings backfill specimens were studied, and the action mechanism of alkalized straw fiber was analyzed by SEM. The results show that the compressive strength of the specimen decreases with the increase of the alkalized straw fiber content. With the increase of the length of alkalized straw fiber, the compressive strength of the specimen first increases and then decreases. The reduction degree of the compressive strength of the specimen by the non-alkalized straw fiber is significantly greater than that of the alkalized straw fiber. With the decrease of cement sand ratio, the compressive strength of the specimen decreases.
    張競,李駿.堿化稻草纖維對尾砂充填體力學性能的影響[J].混凝土與水泥制品,2022(7):60-63. ZHANG J,LI J.Effect of Alkalized Straw Fiber on Mechanical Properties of Tailings Backfill[J].China Concrete and Cement Products,2022(7):60-63.
    玄武巖纖維混凝土動態力學性能及數值模擬
    玄武巖纖維混凝土動態力學性能及數值模擬
    • 王 嵩,劉潤清,趙 碩,孫斯慧
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為了研究沖擊荷載作用下玄武巖纖維(BF)對混凝土性能的影響,采用分離式霍普金森壓桿(SHPB),在0.6 MPa沖擊氣壓作用下對不同BF體積摻量(0、0.05%、0.10%、0.15%、0.20%、0.25%、0.30%、0.35%)玄武巖纖維混凝土(BFRC)進行了沖擊壓縮試驗,并基于試驗數據,選用修正后的HJC本構模型對動態沖擊過程進行了模擬。結果表明:BFRC相較于素混凝土具有更好的抗沖擊性能,且0.30%體積摻量的BF對混凝土的增韌效果最好;修正后的HJC模型可以較好地反映出BFRC的應力、應變狀態,體現BFRC破壞過程中裂紋的發展規律,模擬結果與試驗結果吻合較好。 Abstract: In order to study the effect of basalt fiber (BF) on the performance of concrete under impact load, the impact compression test of basalt fiber reinforced concrete(BFRC) with different volume content of BF (0, 0.05%, 0.10%, 0.15%, 0.20%, 0.25%, 0.30%, 0.35%) was carried out by using split hopkinson pressure bar(SHPB) under the impact pressure of 0.6 MPa. Based on the test datas, the modified HJC constitutive model was selected to simulate the dynamic impact process. The results show that the BFRC has better impact load resistance than plain concrete, and BF with 0.30% volume content has the best toughening effect on concrete. The modified HJC model can better reflect the stress and strain state of BFRC and reflect the crack development law in the failure process of BFRC. The simulation results are in good agreement with the experimental results.
    王嵩,劉潤清,趙碩,等.玄武巖纖維混凝土動態力學性能及數值模擬[J].混凝土與水泥制品,2022(7):64-68. WANG Song, LIU Run-qing, ZHAO Shuo,et al.Dynamic Mechanical Properties and Numerical Simulation of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(7):64-68.
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