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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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    第九期

    超高性能混凝土(UHPC)在裝配式建筑中的應用及質量控制指標
    超高性能混凝土(UHPC)在裝配式建筑中的應用及質量控制指標
    • 樊俊江,於林鋒
    2020年第9期
    摘要
    引用本文
    摘 ? 要:分析了兩類超高性能混凝土(UHPC)在裝配式建筑中的應用前景與相應的質量指標體系。結果表明:結構類超高性能混凝土可用于裝配式漿錨搭接與裝配式預制構件中,建議其抗壓強度不低于120 MPa、抗彎強度不低于14 MPa、抗拉強度不低于7 MPa;裝飾類超高性能混凝土可用于裝配式建筑外墻裝飾,建議其抗壓強度不低于100 MPa、抗彎強度不低于10 MPa、抗拉強度不低于5 MPa;裝配式建筑用超高性能混凝土的28 d干縮不宜大于300 με,3 d自收縮不大于800 με,28 d氯離子擴散系數不宜大于0.30×10-12 m2/s。 Abstract: The application prospect and corresponding quality index system of two kinds of ultra-high performance concrete(UHPC) in prefabricated buildings were analyzed. The results show that the structural ultra-high performance concrete can be used in the assembly type of slurry anchor lap and assembly type of prefabricated components, and its compressive strength is not less than 120 MPa, bending strength is not less than 14 MPa, and tensile strength is not less than 7 MPa. Decorative ultra-high performance concrete can be used for decoration of exterior wall of prefabricated building. It is suggested that its compressive strength should not be less than 100 MPa, bending strength should not be less than 10 MPa and tensile strength should not be less than 5 MPa. The 28 d dry shrinkage of UHPC for prefabricated building should not be greater than 300 με, the 3 d self shrinkage should not be greater than 800 με, and the 28 d chloride diffusion coefficient should not be greater than 0.30×10-12 m2/s.
    樊俊江,於林鋒.超高性能混凝土(UHPC)在裝配式建筑中的應用及質量控制指標[J].混凝土與水泥制品,2020(9):1-4. FAN J J,YU L F.Analysis of Application of Ultra-high Performance Concrete in Prefabricated Building and Its Quality Control Index[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):1-4.
    3D打印混凝土相關性能研究進展
    3D打印混凝土相關性能研究進展
    • 段 嚴,秦先濤
    2020年第9期
    摘要
    引用本文
    摘 ? 要:從流動性、黏結強度、凝結時間、纖維增強等方面概括了目前3D打印混凝土的研究進展,分析了外加劑、骨料級配和特殊材料應用于改善3D打印混凝土流動性的現狀;總結了3D打印混凝土層間黏結強度的不足及改善措施;從外加劑和水泥的選擇上探討了3D打印混凝土凝結時間的控制方案,分析了纖維用于3D打印混凝土中的優勢以及特殊性;結合現狀對3D打印混凝土未來研究方向進行了展望。 Abstract: The research progress of 3D printed concrete (3DPC) from fluidity, bond strength, setting time and fiber reinforcement is summarized. Specifically, the fluidity of 3DPC is analyzed based on the additive, gradation and special materials. While the weaknesses of bond strength of 3DPC and improvement measures are summarized. Then, the control scheme for the setting time is researched from the point of additive and cement. Meanwhile, the advantage and particularity of the use of fiber in 3DPC are analyzed. At last, the future research directions of 3DPC are proposed for promoting the development of 3DPC.
    段嚴,秦先濤.3D打印混凝土相關性能研究進展[J].混凝土與水泥制品,2020(9):5-10. DUAN Y,QIN X T.Research Progress on the Properties of 3D Printed Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):5-10.
    氣凝膠-水泥復合多孔材料的孔結構與硬化性能
    氣凝膠-水泥復合多孔材料的孔結構與硬化性能
    • 路 玨1,2,蔣 俊1,盧忠遠1,李 軍1
    2020年第9期
    摘要
    引用本文
    摘 ? 要:采用體積取代法將氣凝膠漿料引入水泥基體中,制備了氣凝膠-水泥復合多孔材料(ACPC),結合壓汞(MIP)、氮吸附(NAD)和掃描電子顯微鏡(SEM)對ACPC孔結構和微觀形貌進行表征,研究了ACPC的孔結構和硬化性能。試驗結果表明,當氣凝膠漿料取代量由0 增加到66%時,材料孔隙率從23.0%上升至78.1%,平均孔徑從45.3 nm增加至198.3 nm。氣凝膠的引入可以細化孔結構,材料介孔孔容由0.03 mL/g增加到0.20 mL/g,孔結構得到改善。在水泥漿體中引入氣凝膠漿料,可以得到干密度為365~1 262 kg/m3、抗壓強度為0.8~24.1 MPa、導熱系數為0.066~0.364 W/(m·K)的ACPC。 Abstract: Aerogel slurry was introduced into cement system to prepare aerogel-cement porous composites (ACPC) by volume substitution method. MIP, NAD and SEM were used to characterizate the pore structure and morphology of ACPC. The pore structure and hardened properties of ACPC were investigated. The results show that the porosity of ACPC increases from 23% to 78.1% and the average pore diameter of ACPC increases from 45.3 nm to 198.3 nm with the increasing aerogel slurry replacement from 0 to 66 %. The aerogel slurry can refine voids, and the mesoporous volume increases from 0.03 mL/g to 0.20 mL/g. Adding aerogel slurry into cement paste can get ACPC with a dry density, compressive strength and thermal conductivity of 365~1 262 kg/m3, 0.8~24.1 MPa, and 0.066~0.364 W/(m·K), respectively. ?
    路玨,蔣俊,盧忠遠,等.氣凝膠-水泥復合多孔材料的孔結構與硬化性能[J].混凝土與水泥制品,2020(9):11-15. LU J,JIANG J,LU Z Y,et al.Study on Pore Structure Characterization and Hardened Properties of Aerogel-Cement Porous Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):11-15.
    濕噴混凝土配合比優化的研究及應用
    濕噴混凝土配合比優化的研究及應用
    • 嚴少洋1,2,閆 松3,劉永勝4
    2020年第9期
    摘要
    引用本文
    摘 ? 要:針對某金礦破碎、易風化的圍巖支護難度大等特點,采用濕噴混凝土技術實施機械化施工。研究了水泥摻量、纖維摻量、水灰比及砂率對濕噴混凝土可泵性及強度的影響。并通過正交試驗方法,討論了摻合料對濕噴混凝土坍落度、擴展度、抗壓與抗折強度的影響規律。結果表明:增加水灰比能顯著提高濕噴混凝土的坍落度,纖維用量增大對強度變化不明顯但其對擴展度影響較大;砂率增大雖然能夠增大混凝土的流動性但是強度呈下降趨勢;通過極差分析結果得出了影響混凝土強度的顯著因素及最優配合比,該配合比成功應用于實際工程。 Abstract: Aiming at the characteristics of crushing and weathering surrounding rock which was difficult to support of a gold mine, the wet shotcreting technology was applied to carry out mechanized construction. The effects of cement content, fiber content, water-cement ratio and sand ratio on the pump ability and strength of wet shotcrete as well as the effects of admixture on slump, extension, compression strength and flexural strength of wet shotcrete were studied by orthogonal test. The results show that the slump of wet shotcrete can be significantly increased by increasing the water-cement ratio, and the increase of fiber content has no obvious effect on the strength but has a great influence on extension. Although the increase of sand ratio can increase the fluidity of concrete, it shows a downward trend to the strength. Through range analysis, the significant factors affecting the strength of concrete and the optimal mix proportion are obtained. The mix proportion has been successfully applied to practical engineering.
    嚴少洋,閆松,劉永勝.濕噴混凝土配合比優化的研究及應用[J].混凝土與水泥制品,2020(9):16-19. YAN SY,YAN S,LIU Y S.Research on Mix Proportion Optimization of Wet Shotcrete and Application[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):16-19.
    礦物摻合料對水泥基材料抗侵蝕性能的影響
    礦物摻合料對水泥基材料抗侵蝕性能的影響
    • 裘智輝1,2,渠亞男1,2,仲新華1,2,李連吉1,2,孔慶欣1,2,蘇婉玉1,2
    2020年第9期
    摘要
    引用本文
    摘 ? 要:研究了石灰石粉、硅灰-石灰石粉、硅灰-粉煤灰、硅灰-礦渣粉和納米Al2O3、納米Fe2O3對全浸泡水泥基膠砂抵抗硫酸鹽和氯鹽復合溶液侵蝕性能的影響,探討了不同組成水泥基材料增強抗侵蝕性的可行性。測試了水泥基膠砂的外觀形貌、強度,并利用XRD分析了侵蝕試樣的物相組成。結果表明,硅灰-礦渣粉增強水泥基材料的抗侵蝕性能較好。 Abstract: The effects of limestone powder, silica ash-limestone powder, silica ash-slag powder nano-Al2O3 and nano-Fe2O3 on the resistance of full-soaked mortar to the erosion of sulfate and chlorine-salt composite solutions were studied. The feasibility of enhancing the resistance of mortar to corrosion of different composed cement-based materials was discussed. The appearance and strength loss of the mortar were tested to characterize the degree of damage to the test piece, and the object composition of the erosion sample was analyzed by X-ray diffraction instrument. The results show that it is feasible to enhance the resistance of mortar with silicon ash-slag powder.
    裘智輝,渠亞男,仲新華,等.礦物摻合料對水泥基材料抗侵蝕性能的影響[J].混凝土與水泥制品,2020(9):20-23,29. QIU Z H,QU Y N,ZHONG X H,et al.Study on Effect of Mineral Doping on Anti-erosion Properties of Cement-based Materials[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):20-23,29.
    混凝土早強性能研究進展和展望
    混凝土早強性能研究進展和展望
    • 丁 斌1,歐陽利軍2,房鈺柯2
    2020年第9期
    摘要
    引用本文
    摘 ? 要:基于國內外的研究成果,將早強型混凝土的制備方法分為摻早強劑、使用特種水泥和摻高分子聚合物三種。分別歸納總結了這三種方法對混凝土早強性能的影響,并簡要分析了各制備方法所存在的問題。此外,介紹了目前提高超高性能混凝土(UHPC)早強性能的方法,并對其未來的研究方向進行了展望。 Abstract: Based on the research results at home and abroad, the preparation methods of early-strength concrete are divided into three types: early strength admixtures, special cement-based materials and high-molecular polymer. The effects of these three methods on the early strength of concrete are summarized. The problems of each preparation method are briefly analyzed. In addition, the current method of ultra-high performance concrete (UHPC) to improve the early strength performance is introduced, and its future research directions are prospected.
    丁斌,歐陽利軍,房鈺柯.混凝土早強性能研究進展和展望[J].混凝土與水泥制品,2020(9):24-29. DING B,OUYANG L J,FANG Y K.Review and Prospect of Early Strength Performance of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):24-29.
    機制砂在免蒸壓管樁混凝土中的應用研究
    機制砂在免蒸壓管樁混凝土中的應用研究
    • 王孟波,明 維,張芳芳,余柯寧
    2020年第9期
    摘要
    引用本文
    摘 ? 要:通過使用機制砂替代天然砂進行免蒸壓管樁混凝土配制試驗,主要對比了不同品質機制砂取代天然砂對管樁混凝土拌和物工作性、力學性能、耐久性能以及樁身抗彎性能的影響,探討了高品質機制砂在免蒸壓管樁混凝土中應用的可行性。結果表明,采用高品質機制砂制備的混凝土拌和物具有較好的和易性,能夠滿足免蒸壓管樁的生產工藝要求。同時,采用高品質機制砂生產的管樁樁身結構性能也滿足相關標準要求。 Abstract: The effect of sand substitution rate of different quality manufactured sand instead of river sand on working performance, mechanical properties and durability of pile concrete as well as bending performance of piles was studied. And the feasibility of high performance mechanical sand in autoclaved pile concrete was also discussed. The test result show that the performance of non-autoclaved pile can meet therequirements of local and national standards, which maded of the high performance mechanism sand, whose concrete performance can meet the non-autoclaved process requirements.
    王孟波,明維,張芳芳,等.機制砂在免蒸壓管樁混凝土中的應用研究[J].混凝土與水泥制品,2020(9):30-33,39. WANG M B,MING W,ZHANG F F,et al.Application Research of Manufactured Sand in Non-autoclaved Pile Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):30-33,39.
    城市地下綜合管廊力學性能研究現狀綜述
    城市地下綜合管廊力學性能研究現狀綜述
    • 林桂武1,常志凱1,林志南1,王家全1,鐘張寶2,胡 鋒2
    2020年第9期
    摘要
    引用本文
    摘 ? 要:歸納總結了大量城市地下綜合管廊運營過程中遇到的問題,指出地下綜合管廊建設和運營過程中遇到的最主要問題為動荷載以及穿越非均勻地基,敘述了地下綜合管廊的研究發展趨勢及其在動荷載和非均勻地基下的力學性能的研究現狀,提出了現有主要成果研究的不足,并對未來研究進行了展望。 Abstract: The problems encountered in the operation of urban underground utility tunnel are summarized, the dynamic load and crossing non-uniform foundation as the most important problems encountered in the construction and operation of underground utility tunnel are concluded. The research development trend of underground utility tunnel and its mechanical properties under dynamic load and non-uniform foundation are reviewed, the main shortcomings of existing research are put forward,and the future research is prospected.
    林桂武,常志凱,林志南,等.城市地下綜合管廊力學性能研究現狀綜述[J].混凝土與水泥制品,2020(9):34-39. LIN G W,CHANG Z K,LIN Z N,et al.Research Status Review of Mechanical Properties of Urban Utility Tunnel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):34-39.
    預制混凝土板樁式結構在公路改擴建中的應用
    預制混凝土板樁式結構在公路改擴建中的應用
    • 朱 俊1,胡 可2,吳平平1,于春江2
    2020年第9期
    摘要
    引用本文
    摘 ?要:為解決高速公路改擴建工程在局部路段面臨的取土、征地困難等問題,研發了一種預制混凝土樁板式結構。該結構以預制混凝土管樁直接支撐預制鋼筋混凝土梁板為承載結構,分析了該結構的特征和優勢,闡述了該結構的構造細節和設計方法,并介紹了該結構在改擴建工程中的應用。 Abstract: In order to solve the difficult problems of collecting land and land requisition faced in the highway reconstruction and expansion project, a new type of highway pile-slab structure was developed. The structure is a simple and permeable load-bearing structure formed by precast piles directly supporting precast reinforced concrete slabs. The typical characteristics and advantages of the structural system are analyzed, the structural details and design methods of the structure are expound and the application of the structure in the reconstruction and expansion project is introduced.
    朱俊,胡可,吳平平,等.預制混凝土板樁式結構在公路改擴建中的應用[J].混凝土與水泥制品,2020(9):40-42,51. ZHU J,HU K,WU P P,et al.Application of Precast Pile-slab Structure in Highway Reconstruction and Expansion Project[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):40-42,51.
    礦物摻合料對PVA-ECC性能的影響
    礦物摻合料對PVA-ECC性能的影響
    • 周 旭,李曉琴,丁 捷,黃 可
    2020年第9期
    摘要
    引用本文
    摘 ? 要:研究了單摻粉煤灰和復摻粉煤灰與硅灰代替部分水泥對PVA-ECC試件力學性能、裂縫寬度及抗滲性能的影響。結果表明,單摻粉煤灰會導致PVA-ECC試件強度下降,但可顯著增加其韌性。復摻粉煤灰與硅灰時,PVA-ECC試件表現出優異的應變硬化特性以及多縫開裂現象,力學性能得到提升,基體均勻性增加,抗滲性能得到改善,最大提升了約33%。試驗得到了具有良好性能的粉煤灰-硅灰-水泥三元體系PVA-ECC試件,其極限拉伸應變達到2.07%,抗壓強度達到42.6 MPa,裂縫寬度較小且分布均勻,滲透系數僅為2.136×10-11 m/s,抗滲性能較優。 Abstract: The effects of single-doped fly ash and mixed fly ash and silica fume instead of part of cement on the mechanical properties, crack width and impermeability of PVA-ECC specimen were studied. The results show that the single-doped fly ash can reduce the strength of PVA-ECC specimen, but significantly increase its toughness. When mixed with fly ash and silica fume, PVA-ECC specimen shows excellent strain hardening characteristics and multi-slit cracking, the mechanical properties are improved, the matrix uniformity is increased, and the impermeability is improved with a maximum increase of about 33%. The good performance of fly ash-silica fume-cement ternary system PVA-ECC specimen is obtained, and its ultimate tensile strain is 2.07%, compressive strength is 42.6 MPa, crack width is small and uniformly distributed, permeability coefficient is only 2.136 × 10-11 m/s, and its impermeability is good.
    周旭,李曉琴,丁捷,等.礦物摻合料對PVA-ECC性能的影響[J].混凝土與水泥制品,2020(9):43-46. ZHOU X,LI X Q,DING J,et al.The Effect of Mineral Admixture on the Performance of PVA-ECC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):43-46.
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