第八期_2019_《混凝土與水泥制品》雜志社

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第八期

粗粒度區間鋼渣微粉在UHPC中的應用研究

祖慶賀1,2，臧軍2，沈曉冬1

２０19年第8期

摘要

引用本文

摘要：用粒度區間為45~80 μm的較粗鋼渣微粉作為摻合料進行了UHPC的應用研究，試驗結果表明，與基準混凝土相比，45~80 μm鋼渣微粉在UHPC中以5%摻量取代水泥和復合摻合料后，UHPC的孔隙率降低、孔徑分布得到優化、塑性黏度降低了42 Pa·s、流動性能提升（V漏斗排空時間減少了20 s）、28 d抗壓強度提高了10~12 MPa、抗折強度提高了2~3 MPa。 Abstract：The coarse steel slag powders with particle sizes ranging from 45 to 80 μm was used in ultra high performance concrete (UHPC) to enhance the properties of concrete. The results show that compared with the reference concrete, when the cement and fly ash in concrete replaced by coarse steel slag powders (45~80 μm) with a concentration of 5%, the porosity of UHPC is reduced, the pore size distribution is optimized, the plastic viscosity is reduced by 42 Pa·s, the flow performance is improved (V funnel emptying time is reduced by 20 s), the 28 d compressive strength is increased by 10~12 MPa, and the flexural strength is increased by 2~3 MPa.

祖慶賀,臧軍,沈曉冬.粗粒度區間鋼渣微粉在UHPC中的應用研究[J].混凝土與水泥制品,2019(8):1-4. ZU Q H,ZANG J,SHEN X D.Application Study of Steel Slag Fine Powders with Coarse Particle Sizes Rang in Ultra High Performance Concrete (UHPC)[J].China Concrete and Cement Products,2019(8):1-4.

具有黏土耐受性緩凝劑的制備及在混凝土中的應用

王兵，范士敏，亓帥，王濤，馬建峰，韓正，冉千平

２０19年第8期

摘要

引用本文

摘要：合成了一種含不同磷酸基個數的有機磷酸鹽緩凝劑，并將其結構、緩凝性能及抗黏土性能進行了測試表征?；炷猎囼灉y試結果表明，合成出的磷酸鹽緩凝劑能延緩水泥水化，緩凝作用好，與聚羧酸減水劑（PCE）復配后，提高了聚羧酸減水劑（PCE）的保坍性能。同時磷酸基緩凝劑還具有很好的抗黏土性能，吸附性能測試表明，所合成的磷酸鹽緩凝劑能減少蒙脫土對減水劑的吸附。 Abstract：A new structure of phosphate retarder with different amount of phosphate groups was systhesized. The chemical structures of these retarders were determined by Fourier transform infrared. The properties of setting time, anti-clay ability and adsorption properties of the phosphate retarders after compound with polycarboxylate acid-based superplastizer(PCE) were studied. The experimental results indicate that the phosphate retarders showe a good performance in terms of workablility retention, retarding ability and anti-clay ability, and the phosphate retarders can reduce the adsorption amount of PCE on montmorillonid.

王兵,范士敏,亓帥,等.具有黏土耐受性緩凝劑的制備及在混凝土中的應用[J].混凝土與水泥制品,2019(8):5-7+18. WANG B,FAN S M,QI S,et al.Synthesis of Phosphate Retarder with Anti-clay Ability and Its Application in Concrete[J].China Concrete and Cement Products,2019(8):5-7+18.

基于抗凍性的負溫混凝土受凍臨界強度研究

江守恒1，董淑慧2，朱衛中3，李鶴斌2，殷少輝1

２０19年第8期

摘要

引用本文

摘要：采用快速凍融循環的試驗方法，研究了經過0 h、12 h、24 h、36 h、48 h、72 h、96 h等不同早期預養后，轉入恒-20 ℃的負溫條件下養護至7 d，再轉標準條件下養護至56 d齡期的混凝土試件經歷不同凍融循環次數后的相對動彈性模量損失，并以未受凍的正溫混凝土標準養護28 d強度和抗凍性為基準，得出了基于抗凍性的負溫混凝土受凍臨界強度值及其預養時間值。結果表明，未摻加防凍劑C30、C40、C50和C60混凝土達到F300次凍融所需受凍臨界強度分別為24.6 MPa、33.6 MPa、40.4 MPa和49.5 MPa，其預養大于等于96 h；摻加防凍劑C30、C40、C50和C60混凝土達到F300次凍融所需受凍臨界強度分別為19.6 MPa、27.5 MPa、31.7 MPa和40.5 MPa，其預養時間大于等于48 h。 Abstract: The rapid freeze-thaw test method is used to study the loss of relative dynamic elastic modulus of concrete specimens after different freeze-thaw cycles. The concrete specimens are pre-cured at different pre-curing time which are 0 h, 12 h, 24 h, 36 h, 48 h, 72 h and 96 h, then transferred to the negative temperature of -20 °C for 7 d, and then transferred to standard-curing condition for 56 d. It comes to the conclusion that the values of critical freezing strengths and pre-curing time of subzero-temperature concrete based on frost resistance which use the strength and frost resistance of unfrozen normal-temperature concrete, that are standard-cured for 28 d, as the benchmark. The results show that the critical freezing strengths of the C30, C40, C50 and C60 concrete required to reach 300 freeze-thaw cycles without antifreeze are 24.6 MPa, 33.6 MPa, 40.4 MPa and 49.5 MPa respectively and the concrete need to be pre-cured for greater than or equal to 96 h; and that with antifreeze are 19.6 MPa, 27.5 MPa, 31.7 MPa and 40.5 MPa respectively and the concrete need to be pre-cured for greater than or equal to 48 h.

江守恒,董淑慧,朱衛中,等.基于抗凍性的負溫混凝土受凍臨界強度研究[J].混凝土與水泥制品,2019(8):8-10. JIANG S H,DONG S H,ZHU W Z,et al.Research on Critical Freezing Strength of Subzero-temperature Concrete Based on Frost Resistance[J].China Concrete and Cement Products,2019(8):8-10.

高強特細砂透水混凝土試驗研究

趙紹飛1,2，陳逸群1,2，朱敏濤1,2，左俊卿2,3

２０19年第8期

摘要

引用本文

摘要：研究了成型方式和膠凝材料總量對透水混凝土強度和透水率的影響。結果表明，加入乳膠溶液可改善透水混凝土的拌合施工狀態，硅灰和粉煤灰的加入提高了透水混凝土的抗壓強度，但會影響透水率。特細砂能夠增加漿體對碎石的包裹性。在三種成型方式中，擊實成型可以大幅提高透水混凝土的抗壓強度，同時可以滿足透水率的要求，通過試驗可配制出28 d抗壓強度為45.7 MPa，透水系數為1.6 mm/s的透水混凝土，并已在實際工程中應用。 Abstract： The effects of forming methods and total amount of cementitious materials on the strength and permeability of pervious cement concrete were studied. Experimental research shows that within the addition of the latex solution can improve the mixing state of the pervious cement concrete. The addition of silica fume and fly ash improves the compressive strength of the pervious cement concrete, but it will affect the permeability. Fine sand can increase the encapsulation of the slurry to the gravel. In the three forming effect, compaction method can greatly improve the compressive strength of the pervious cement concrete, and meet the requirements of permeability. A pervious cement concrete with a compressive strength of 45.7 MPa and a permeability coefficient of 1.6 mm/s can be prepared, and is applied in the practical engineering in Shanghai.

趙紹飛,陳逸群,朱敏濤,等.高強特細砂透水混凝土試驗研究[J].混凝土與水泥制品,2019(8):11-14. ZHAO S F,CHEN Y Q,ZHU M T,et al.Experimental Study on High Strength Pervious Cement Concrete with Super-fine Sand[J].China Concrete and Cement Products,2019(8):11-14.

水管冷卻對大體積混凝土溫度應力的影響研究

王修山1，侯寧2

２０19年第8期

摘要

引用本文

摘要：為了研究大體積混凝土水化過程中的溫度和應變規律，探尋大體積混凝土開裂的位置和時間，提出了有效的防裂措施，并考慮冷卻水作用，模擬了不同澆筑溫度、絕熱溫升、冷卻水流量下大體積混凝土的溫度和溫度應力在不同齡期下的發展過程。結果表明，澆筑溫度和絕熱溫升的升高增大了混凝土第一主拉應力，增加了開裂的可能性。大體積混凝土在水化熱作用下內部溫度呈現急升緩降的特點。冷卻水管能明顯降低大體積混凝土的內外平均溫差，減小混凝土的表面應力，但是在內部個別區域出現溫度應力集中，可能會導致混凝土內部微裂縫的產生。 Abstract： In order to study the law of temperature field and strain field in the process of hydration heat of mass concrete, the location and time of cracking of mass concrete was explored, and effective anti-cracking measures was put forward. Considering the effect of cooling water, the development process of temperature and temperature stress under different pouring temperature, adiabatic temperature rise and cooling water flow under different ages were simulated. The results show that the increase of pouring temperature and adiabatic temperature rise increases the first main tensile stress of concrete and the possibility of cracking. The internal temperature of mass concrete is characterized by a sharp rise and slow down under the action of hydration heat. The cooling water pipe can obviously reduce the average temperature difference of inside and outside the mass concrete and the surface stress of the concrete, but the temperature stress concentration appears in the internal individual areas, which may lead to the production of micro-cracks inside the concrete.

王修山,侯寧.水管冷卻對大體積混凝土溫度應力的影響研究[J].混凝土與水泥制品,2019(8):15-18. WANG X S, HOU N.Influence Research of Water Pipe Cooling on Temperature Stress of Mass Concrete[J].China Concrete and Cement Products,2019(8):15-18.

煤矸石陶?；炷撂蓟阅茉囼炑芯? />
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<a href="/product/904.html" target="_parent" class="title"><i class="iconfont12"></i>煤矸石陶?；炷撂蓟阅茉囼炑芯?/a>

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<span class="attrValue"><i class="iconfont2"></i> 李志凱，鄒仁華，邱繼生，關虓，王斌</span>
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<span class="attrValue"> ２０19年第8期</span>
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<div class="zhai"><i class="iconfont11"></i>摘要</div>
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<span class="newMs">摘要：為探究煤矸石陶?；炷恋目固蓟阅?，通過混凝土快速碳化試驗，研究了煤矸石陶粒取代率及碳化時間對煤矸石陶?；炷量固蓟阅艿挠绊?，并建立了適用于不同煤矸石陶粒取代率和不同碳化時間的混凝土碳化模型。研究表明，隨著碳化時間的增加，各取代率混凝土的碳化深度逐步加大，且碳化深度與碳化時間的平方根成線性關系，煤矸石陶粒取代率依次為20％、40％和60％時，混凝土抗碳化性能逐漸減弱。
Abstract: In order to explore the anti-carbonization performance of coal gangue ceramsite concrete, the effects of coal gangue ceramsite substitution rate and carbonization time on the carbonation resistance of coal gangue ceramsite concrete were studied through the rapid carbonation test of concrete, and the application of different coal gangue pottery was established. Concrete carbonization model was built with particle replacement rate and different carbonization time. The research results show that with the increase of carbonization time, the carbonization depth of concrete with different substitution rates is gradually increased, and the carbonization depth is linear with the square root of carbonization time. When the replacement rate of coal gangue ceramics is 20%, 40% and 60, respectively, the carbonation resistance of the concrete is gradually weakened.</span>

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<span class="attrValue3"> 李志凱,鄒仁華,邱繼生,等.煤矸石陶?；炷撂蓟阅茉囼炑芯縖J].混凝土與水泥制品,2019(8):19-21+44.
LI Z K,ZOU R H,QIU J S,et al.Experimental Study on Carbonation Resistance of Coal Gangun Ceramsite Concrete[J].China Concrete and Cement Products,2019(8):19-21+44.</span>
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陶瓷粉作混凝土礦物摻合料的研究進展

趙方正1，聞寶聯2，劉榮進3

２０19年第8期

摘要

引用本文

摘要：從陶瓷粉的材料特性入手，闡述了陶瓷粉作為混凝土礦物摻合料的可行性和水化特性，在此基礎上，進一步從陶瓷粉對水泥基膠凝材料的工作性、強度、耐久性的影響等方面，綜述了水泥-陶瓷粉膠凝材料的國內外研究現狀。并針對現有研究存在的問題，對水泥-陶瓷粉膠凝材料的進一步研究提出了建議。 Abstract: The feasibility and hydration characteristic of ceramic power as the mineral admixtures of concrete is described based on the material properties of ceramic powder. On the basis of above all, the research status at home and abroad of the cement-ceramic power cementitious material is summarized from the influences of ceramic power on the working performance, strength and durability of cement-based materials. Aiming at the problems of the present ceramic powder cement-based material research, some suggestions for further research work on cement-ceramic power cementitious material are put forward.

趙方正,聞寶聯,劉榮進.陶瓷粉作混凝土礦物摻合料的研究進展[J].混凝土與水泥制品,2019(8):22-26. ZHAO F Z,WEN B L,LIU R J,et al.Research Progress of Ceramics Powders as Mineral Admixtures of Concrete[J].China Concrete and Cement Products,2019(8):22-26.

混凝土單軸加載動力性能試驗研究

沈麗1，張麗1，余振鵬2，謝興華2

２０19年第8期

摘要

引用本文

摘要：為了探究混凝土單軸加載動力性能，設置了三種不同強度等級的混凝土和四種加載應變率，用液壓伺服試驗機和材料直剪儀對混凝土開展單軸受壓、單軸劈拉和剪切進行試驗研究，得到了不同加載工況下混凝土的破壞形態和強度特征值，并分析了加載應變率對混凝土受壓、劈拉和剪切力學性能的影響。結果表明，加載應變率對混凝土受壓、劈拉和剪切加載方式均具有明顯影響；隨著加載應變率的提高，混凝土剪切破壞形態由靜力加載應變率剪切破壞斷面不平整和平行于剪切方向裂縫較為不規整，發展至動力加載應變率混凝土剪切破壞斷面較為平整和平行于剪切方向破壞裂縫逐步平直；混凝土剪切強度隨著加載應變率的提高逐步增大，受加載應變率影響剪切強度提高幅度低于劈拉加載方式，高于受壓加載方式；同時，從定量和破壞機理角度分析了加載應變率對混凝土力學性能影響。 Abstract: In order to study the dynamic performance of concrete under uniaxial loading, three kinds of concrete with different strength grades and four kinds of loading strain rates are set up. The hydraulic servo machine and material direct shear apparatus are used to carry out uniaxial compression, uniaxial splitting tension and shear tests on concrete. The failure modes and strength characteristic values of concrete under different loading conditions are obtained from the tests, and the effects of loading strain rates on compression, splitting tension and shear of concrete are analyzed. The main conclusions are as follows: the compression, splitting and shear loading modes of concrete are obviously affected by the loading strain rate; with the increase of the loading strain rate, the shear failure mode of concrete develops from the irregularity of the static loading strain rate, the irregularity of the shear failure section and the irregularity of the cracks parallel to the shear direction to the dynamic loading strain rate. The shear failure section of concrete is fairly flat and the cracks parallel to the shear direction are gradually straight; the shear strength of concrete increases with the increase of loading strain rate, and the increase of shear strength affected by loading strain rate is lower than that of splitting tension loading mode and higher than that of compression loading mode; in addition, the influence of loading strain rate on the mechanical properties of concrete is analyzed quantitatively and from the point of view of failure mechanism.

沈麗,張麗,余振鵬,等.混凝土單軸加載動力性能試驗研究[J].混凝土與水泥制品,2019(8):27-31. SHEN L,ZHANG L,YU Z P,et al.Experimental Study on Dynamic Behavior of Concrete under Uniaxial Loading[J].China Concrete and Cement Products,2019(8):27-31.

軸壓及剪跨比對PHC管樁抗剪承載力影響模擬分析

郭浩東，曾國紅，賀武斌，郭昭勝

２０19年第8期

摘要

引用本文

摘要：分析了軸壓及剪跨比對預應力高強度混凝土管樁（PHC管樁）抗剪承載力的影響。結果表明，在剪跨比一定情況下，PHC管樁的極限抗剪能力隨軸壓的增大有所提高，軸壓比與管樁的極限抗剪承載能力近似呈線性關系；增大剪跨比，PHC管樁的抗剪承載力明顯降低，其破壞形式也隨之發生改變。 Abstract: The influence of axial compression and shear span ratio on the shear capacity of PHC piles were analyzed. The results show that the shear capacity of PHC pipe piles increases with the increase of axial compression under the condition of ultimate axial compression, and the relationship between the axial compression ratio and the ultimate shear capacity of pipe piles is approximately linear. Based on the results of simulation analysis and the existing theoretical formulas, the formulas for calculating shear capacity considering the factors of axial compression and shear span ratio are derived.

郭浩東,曾國紅,賀武斌,等.軸壓及剪跨比對PHC管樁抗剪承載力影響模擬分析[J].混凝土與水泥制品,2019(8):32-36. GUO H D,ZENG G H,HE W B,et al.Simulated Analysis on the Effects of Axial Compression and Shear Span Ratio on Shear Bearing Capacity of PHC Piles[J].China Concrete and Cement Products,2019(8):32-36.

CFRP鋼管-RPC短柱力學性能試驗研究

簡超，焦楚杰，李松，譚淑珍，崔力仕

２０19年第8期

摘要

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摘要：以鋼管直徑、CFRP層數為試驗變量，探究了CFRP鋼管-RPC的破壞形態、荷載-位移曲線以及試驗變量對CFRP鋼管-RPC極限承載力的影響。結果表明，CFRP鋼管-RPC短柱的破壞形態分為鼓曲破壞和剪切破壞兩種，當CFRP鋼管-RPC套箍系數較小時，多數構件呈剪切破壞；當CFRP鋼管-RPC套箍系數較大時，多數構件呈鼓曲形破壞。當CFRP鋼管-RPC套箍系數較小時，構件達到極限荷載后承載力快速下降，反之，構件承載力下降陡峭并有上升的趨勢，類似于“屈服平臺”。CFRP鋼管-RPC短柱的極限承載力隨著鋼管直徑增大和碳纖維布層數增多而增加，CFRP鋼管-RPC短柱的荷載-位移全曲線可大致分為：彈性階段、彈塑性階段、荷載下降段以及強化階段，部分構件存在著承載力持平階段。 Abstract: The diameter of steel tubes and the number of CFRP layers as the test variables were studied, the failure mode of CFRP steel-RPC, load-displacement curve and the influence of test variables on the ultimate bearing capacity of CFRP steel-RPC were explored. The experimental results show that the failure modes of CFRP steel-RPC short column are divided into two types: buckling failure and shear failure. When the coefficient of CFRP steel-RPC hoop is large, most of the components show bulging failure. When the coefficient of CFRP steel-RPC hoop is small, the bearing capacity of the component decreases rapidly after reaching the ultimate load; otherwise, the bearing capacity of the component declines steeply and has an upward trend, similar to the "yield platform". The ultimate bearing capacity of CFRP steel-RPC short column increases with the increase of steel tube diameter and CFRP steel-RPC short column number of layers. The full load-displacement curve of CFRP steel-RPC short column can be roughly divided into: elastic stage, elastic-plastic stage, load drop stage and strengthening stage.

簡超,焦楚杰,李松,等.CFRP鋼管-RPC短柱力學性能試驗研究[J].混凝土與水泥制品,2019(8):37-40. JIAN C,JIAO C J,LI S,et al.Experimental Research on Mechanical Properties of CFRP-steel Tubular-reactive Powder Concrete Column[J].China Concrete and Cement Products,2019(8):37-40.

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