苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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第七期

核电工程用大掺量矿物掺合料高性能混凝土试验研究
核电工程用大掺量矿物掺合料高性能混凝土试验研究
  • 刘向坤,胡德华,张 伟,涂 涛
2022年第7期
摘要
引用本文
摘   要:在矿物掺合料总掺量35%~60%和水胶比0.42~0.29的情况下,采用粉煤灰、矿粉复掺,设计了系列大掺量矿物掺合料高性能混凝土(HPC)配合比,试验研究了矿物掺合料掺量、水胶比对HPC坍落度、抗压强度、抗碳化性能、抗氯离子渗透性能、早期收缩性能的影响。结果表明:矿物掺合料可显著改善HPC的性能,且随着水胶比的降低,矿物掺合料对HPC性能的改善效果更显著;所制备的大掺量矿物掺合料HPC具有良好的技术可行性,满足相关核电工程设计要求。 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.
刘向坤,胡德华,张伟,等.核电工程用大掺量矿物掺合料高性能混凝土试验研究[J].混凝土与水泥制品,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设计
再生微粉泡沫混凝土的配合比设计
  • 谢洪阳1,董建军1,戴宜文1,邓 勇1,邓明伟2
2022年第7期
摘要
引用本文
摘   要:通过正交试验研究了气泡群掺量、再生微粉掺量、水料比和羟丙基甲基纤维素醚(HPMC)掺量对再生微粉泡沫混凝土性能的影响,并结合功效系数法确定了再生微粉泡沫混凝土的最优配合比。采用SEM和XRD探究了再生微粉泡沫混凝土的微观结构。结果表明:再生微粉泡沫混凝土的抗压强度随着气泡群掺量、再生微粉掺量的增加呈下降趋势,随着水料比的增加呈先上升后下降的趋势,随着HPMC掺量的增加呈上升趋势;再生微粉泡沫混凝土的最优配合比为气泡群掺量4%、再生微粉掺量30%、水料比0.6、HPMC掺量0.07%;再生微粉泡沫混凝土抗压强度的提升主要归因于孔隙细化和HPMC减少了连通孔的产生。 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.
谢洪阳,董建军,戴宜文,等.再生微粉泡沫混凝土的配合比设计[J].混凝土与水泥制品,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.
再生细骨料的级配优化及对混凝土性能的影响
再生细骨料的级配优化及对混凝土性能的影响
  • 艾洪祥1,刘 洋1,卢 霄1,李绍纯2,郑海康1,马旭东1
2022年第7期
摘要
引用本文
摘   要:研究了再生细骨料的掺量和颗粒级配对混凝土工作性、力学性能、抗冻性能和耐久性能的影响。结果表明:再生细骨料的最佳掺量为20%,此时,混凝土的工作性和力学性能较好;采用再生细骨料(Ⅱ区粗砂)等质量替代20%天然砂配制的混凝土工作性、力学性能较优,其28 d抗压强度相比于采用天然砂的基准组提高了9%,且其抗冻性能、耐久性能与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,刘洋,卢霄,等.再生细骨料的级配优化及对混凝土性能的影响[J].混凝土与水泥制品,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.
废玻璃粉活性激发及对砂浆性能的影响
废玻璃粉活性激发及对砂浆性能的影响
  • 岳 龙,季 涛,周钰鑫,王 晟,蒋铭昊,符 涛,张士萍
2022年第7期
摘要
引用本文
摘   要:采用碱激发剂和盐激发剂激发废玻璃粉的活性,研究了活性激发前后废玻璃粉对砂浆ASR膨胀和强度的影响。结果表明:未活性激发时,当废玻璃粉的取代率为10%时,砂浆的抗折强度和膨胀率均优于基准组;碱激发剂可有效侵蚀废玻璃粉,产生活性SiO2,但碱过量会引起碱骨料反应的发生,降低砂浆的强度和耐久性;盐激发剂既能促进废玻璃粉中活性SiO2的释放,又能生成钙矾石,提高基体密实度,但掺量过高会造成钙矾石过量,导致基体结构疏松,从而降低砂浆的强度和耐久性。 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.
岳龙,季涛,周钰鑫,等.废玻璃粉活性激发及对砂浆性能的影响[J].混凝土与水泥制品,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.
碱激发矿渣砂浆的介质传输性能研究
碱激发矿渣砂浆的介质传输性能研究
  • 罗具乾1,万小梅1,2,王 腾3,于 琦1,3,徐培蓁1,曾云辉1,刘 杰1
2022年第7期
摘要
引用本文
摘   要:通过盐池浸泡试验研究了非饱和条件下碱激发矿渣砂浆的介质传输机理,分析了不同激发剂和粉煤灰掺量对碱激发矿渣砂浆中水分和氯离子传输性能的影响。结果表明:水玻璃激发矿渣砂浆的毛细吸水系数较小,强度较高;非饱和条件下,碱激发矿渣砂浆的氯离子传输性能显著低于普通水泥砂浆;水玻璃激发矿渣砂浆的表观氯离子扩散系数较NaOH激发矿渣砂浆略高。 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.
罗具乾,万小梅,王腾,等.碱激发矿渣砂浆的介质传输性能研究[J].混凝土与水泥制品,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增强海水海砂混凝土柱轴压性能研究
GFRP增强海水海砂混凝土柱轴压性能研究
  • 李佳敏a,杨树桐b,刘 畅b
2022年第7期
摘要
引用本文
摘   要:研究了GFRP纵筋与GFRP箍筋共同作用、GFRP管与GFRP筋共同作用对海水海砂混凝土(SSC)柱轴压性能的影响。结果表明:随着GFRP纵筋配筋率的增加,SSC柱的极限承载力相比对照组提高了4.3%~49.8%;采用GFRP管与GFRP筋共同增强后,SSC柱的承载力和延性进一步提高,试件破坏后整体形状完整,破坏形式得到了改善。 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,杨树桐,刘畅.GFRP增强海水海砂混凝土柱轴压性能研究[J].混凝土与水泥制品,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.
装配式钢骨增强微孔混凝土复合楼板力学性能试验研究
装配式钢骨增强微孔混凝土复合楼板力学性能试验研究
  • 王洪镇1,王海瑞1,苏明明2,马得俊2,马 寿2,马亮亮3
2022年第7期
摘要
引用本文
摘   要:为研究实际工程中装配式钢骨增强微孔混凝土复合楼板的承载能力,通过静载试验,得到了其荷载-挠度曲线和裂缝长期发展特征,并对该复合楼板进行了配筋计算、裂缝宽度和挠度验算。此外,采用有限元软件MARC对复合楼板进行了受力分析,并与试验结果进行了对比,发现两者吻合程度较高。研究结果可为相关复合楼板的设计提供参考。 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.
王洪镇,王海瑞,苏明明,等.装配式钢骨增强微孔混凝土复合楼板力学性能试验研究[J].混凝土与水泥制品,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.
添加纤维材料的混凝土预制复合墙体应用分析
添加纤维材料的混凝土预制复合墙体应用分析
  • 张亚东1,段宜栋2,梁美清3
2022年第7期
摘要
引用本文
摘   要:采用MATLAB软件中的识别图像控制技术,对典型混凝土图像数据进行处理,还原了混凝土中骨料的真实排布情况,同时,探究了基于装配式预制部品部件的保温一体化复合墙体的新型构造形式。结果表明:在混凝土中添加纤维材料可有效控制复合墙体的开裂问题;采用外叶板+保温板+内叶墙的“夹心保温三明治板”构造形式可有效解决装配式建筑底部加强区所用墙体超宽、超高及外窗开洞存在的问题。 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.
张亚东,段宜栋,梁美清.添加纤维材料的混凝土预制复合墙体应用分析[J].混凝土与水泥制品,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.
碱化稻草纤维对尾砂充填体力学性能的影响
碱化稻草纤维对尾砂充填体力学性能的影响
  • 张 竞,李 骏
2022年第7期
摘要
引用本文
摘   要:将经过浓度为4%的NaOH溶液碱化处理过的稻草纤维作为加筋材料用于尾砂充填体试件的制备,研究了灰砂比、碱化稻草纤维的长度和掺量对尾砂充填体试件抗压强度的影响,并借助扫描电镜(SEM)从微观角度分析了碱化稻草纤维的作用机理。结果表明:随着碱化稻草纤维掺量的增加,试件的抗压强度下降;随着碱化稻草纤维长度的增加,试件的抗压强度先增大后减小;未碱化稻草纤维对试件抗压强度的降低程度显著大于碱化稻草纤维;随着灰砂比的减小,试件的抗压强度降低。 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.
张竞,李骏.碱化稻草纤维对尾砂充填体力学性能的影响[J].混凝土与水泥制品,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.
玄武岩纤维混凝土动态力学性能及数值模拟
玄武岩纤维混凝土动态力学性能及数值模拟
  • 王 嵩,刘润清,赵 硕,孙斯慧
2022年第7期
摘要
引用本文
摘   要:为了研究冲击荷载作用下玄武岩纤维(BF)对混凝土性能的影响,采用分离式霍普金森压杆(SHPB),在0.6 MPa冲击气压作用下对不同BF体积掺量(0、0.05%、0.10%、0.15%、0.20%、0.25%、0.30%、0.35%)玄武岩纤维混凝土(BFRC)进行了冲击压缩试验,并基于试验数据,选用修正后的HJC本构模型对动态冲击过程进行了模拟。结果表明:BFRC相较于素混凝土具有更好的抗冲击性能,且0.30%体积掺量的BF对混凝土的增韧效果最好;修正后的HJC模型可以较好地反映出BFRC的应力、应变状态,体现BFRC破坏过程中裂纹的发展规律,模拟结果与试验结果吻合较好。 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,刘润清,赵硕,等.玄武岩纤维混凝土动态力学性能及数值模拟[J].混凝土与水泥制品,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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