第三期_2017_《混凝土與水泥制品》雜志社

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第三期

助磨劑對礦渣性能的影響研究

饒舜

２０17年第3期

摘要

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摘要：從比表面積、膠砂強度、水化產物等方面研究對比了單一助磨劑和復配助磨劑對?；郀t礦渣性能的影響，同時探索了有效助磨劑對礦渣粉助磨時的合適摻量。試驗結果表明，助磨劑能有效提高粉磨效率，增大物料的比表面積。 Abstract：The effect of grinding aids and composite grinding aids on grinding performance of slag was studied by determining specific surface area, mortar strength and cement hydration. The suitable addition content of the grinding aids was also studied. The results showed that all grinding aids have good grinding effect on slag and specific surface area.

饒舜.助磨劑對礦渣性能的影響研究[J].混凝土與水泥制品,2017(3):89-91. RAO S.Influence Study of Grinding Aids on Properties of Slag[J].China Concrete and Cement Products,2017(3):89-91.

基于正交試驗法的粉砂水泥土配合比設計

黃達1，楊骕2，虞愛平1

２０17年第3期

摘要

引用本文

摘要：對一種粉砂土水泥土進行配合比設計，該水泥土僅以當地灘涂粉砂土作為骨料，不使用砂石等粗骨料。采用三因素三水平的正交試驗法對其配合比進行試驗，通過極差和方差分析，得到土膠比、水膠比、水泥量對水泥土坍落度和28d抗壓強度的影響程度；進行了回歸分析，建立了線性回歸方程；結合相應曲線，得到相應情況下的最優配合比。 Abstract: A kind of silty sand concrete mixure ratio is designed. This concrete selects the silty sand on local beaches as fine aggregate of concrete. Three factors of soil cement ratio, water cement ratio and cement dosage are considered in an orthogonal test with three levels adopted in three factors. On the basis of range and variance analysis of the test results, the influence of different experimental factors on the 28d compression strength and the slump is studied. A series of regression relationships of 28d compression strength and the slump with regression software are derived. According to the corresponding curves, the optimal mixure ratio is obtained.

黃達,楊骕,虞愛平.基于正交試驗法的粉砂水泥土配合比設計[J].混凝土與水泥制品,2017(3):84-88. HUANG D, YANG S, YU A P.Design of Mixture of Silly Sand Concrete Based on Orthogonal Test[J].China Concrete and Cement Products,2017(3):84-88.

不發火混凝土在肯尼亞蒙內鐵路工程中的應用

尤浩1，牛祝平2，楊方娃2，楊建軍3

２０17年第3期

摘要

引用本文

摘要：在東非肯尼亞蒙內鐵路工程中，車站的裝機維修保養車間等設計有不發火的細石混凝土地面，以防止在遭遇撞擊或摩擦的情況下產生火花。本文從東非地區當地原材料入手，通過對不同混凝土配比的工作性、強度及不發火性能的對比研究，采用當地地材配制出了滿足規范要求的不發火混凝土，并對施工過程中需要注意的問題進行了敘述。 Abstract: In the Mombasa-Nairobi standard gauge railway project of Kenya, the non-sparking concrete was used in the installation and maintenance room of the railway station to avoid sparking when collision and friction happened. The raw material in the East Africa was used to study the work ability, strength and non-sparking performance. The non-sparking concrete that meeting the requirement was prepared and the issues in the construction were described.

尤浩,牛祝平,楊方娃,等.不發火混凝土在肯尼亞蒙內鐵路工程中的應用[J].混凝土與水泥制品,2017(3):81-83. YOU H, NIU Z P, YANG F W,et al.Application of Non-sparking Concrete in Mombase-Nairobi Standard Gauge Railway Project[J].China Concrete and Cement Products,2017(3):81-83.

運營公路隧道襯砌病害力學模型及粘貼鋼板加固研究

劉華莉1，師剛1,2

２０17年第3期

摘要

引用本文

摘要：基于荷載-結構法隧道計算理論，建立了公路隧道襯砌厚度不足病害的力學模型，分析了粘貼鋼板加固計算理論理論，研制了公路隧道襯砌病害及加固分析軟件，可以量化評價襯砌厚度不足及粘貼鋼板加固后對結構承載力的影響。以某公路隧道為依托，利用公路隧道病害加固軟件，分析了二襯配筋不足、厚度不足等襯砌缺陷對其結構安全影響，提出采用粘貼鋼板加固，并分析了治理后結構安全性，驗證了加固措施的合理性。 Abstract: Based on the calculation theory of load structure method on tunnel, the mechanical simulation model of the highway tunnel lining disease of lining thickness was established, and the reinforcing with bonding steel plates was analyzed. The highway tunnel lining damage and reinforcement mechanics simulation software was developed to evaluate the bearing capacity of lining diseases and bonding steel plate. Combined with the tunnel of the highway, the software was used to analyze the influence that second lining defects, such as inadequate arrangement of reinforcement and insufficient thickness on the structural safety and put forward the method to strengthen the structure with bonded steel plates. The safety of the structure after treatment by establishing the calculation model of bonded steel plate was analyzed to verify the rationality of reinforcement measures.

劉華莉,師剛.運營公路隧道襯砌病害力學模型及粘貼鋼板加固研究[J].混凝土與水泥制品,2017(3):75-80. LIU H L, SHI G.Research on Mechanical Simulation of Highway Tunnel Lining Disease and Bonding Steel Plate Reinforcement[J].China Concrete and Cement Products,2017(3):75-80.

混凝土鉆磨試驗方法研究

孫蓓，焦楚杰

２０17年第3期

摘要

引用本文

摘要：針對混凝土鉆磨破壞現有測定方法的弊端，在優選鉆頭的前提下，探索了鉆磨時間和荷載對混凝土鉆磨深度的影響規律，研究了混凝土不同條件下鉆磨深度的比較方法，確定了不同強度等級混凝土的最佳鉆磨時間和荷載。在此基礎上，提出了與鉆磨破壞相應、適合實驗室用的鉆磨試驗新方法，并在超高強混凝土上進行了應用。 Abstract: According to the deficiencies in measurement method of concrete drill-grinding damage, the influence laws of drill-grinding time, load on drill-grinding depth of concrete were studied based on the premise of drill selecting, the comparative method of drill-grinding depth of concrete under different conditions is pointed out, and optimal drill-grinding time and the load of concrete with the different strength grade are confirmed. On this basis, a new drill-grinding test method, which is applicable to lab, corresponding to concrete drill-grinding damage is put forward, and is applied on ultra-high strength concrete.

孫蓓,焦楚杰.混凝土鉆磨試驗方法研究[J].混凝土與水泥制品,2017(3):70-74. SUN Bi, JIAO C J.Study on Experiment Method of Concrete Drill-grinding[J].China Concrete and Cement Products,2017(3):70-74.

移動筒倉對散裝干混砂漿質量的影響

章銀祥1,2，郜偉軍1,2

２０17年第3期

摘要

引用本文

摘??要：研究了干混砂漿散裝移動筒倉對散裝干混砂漿質量的影響。使用自行設計的移動筒倉在線取樣器取樣，利用移動筒倉進、出料均勻度的差值來評價移動筒倉的防離析效果。試驗結果表明，移動筒倉進、出料均勻度的差值應≤5。連續混漿機的構造對新拌濕砂漿的質量影響較大；將連續混漿機的出料進行二次標準攪拌，利用二次攪拌前、后新拌濕砂漿的稠度差可以評價連續混漿機的混漿效果；普通干混砌筑砂漿、普通干混抹灰砂漿采用連續混漿機二次混漿前、后的稠度差應≤12。Abstract:Therelationshipbetweenthemobilesilostructureandthequalityofthebulkdry-mixedmortarisstudied,andthequalityofthebulkdry-mixedmortarismoreinfluencedbythestructureofthemobilesilo.Itcanbeevaluatedtheanti-segregatingresultofmobilesilousingtheuniformitydifferencebetweenthechargeanddischargeofdry-mixedmortarbyusing?on-linesamplingequipment.Theresultsshowthattheuniformitydifferenceshouldbeless5.Thequalityofthefreshmortarismoreinfluencedbythestructureofthecontinuousmixer;itcanbeevaluatedthemixingresultofthecontinuousmixerusingtheconsistencedifferencebetweenthebeforeandtheafterofstandardre-mixing,andtheconsistencedifferenceofplasteringandmasonrymortarshouldbeless12.

章銀祥,郜偉軍.移動筒倉對散裝干混砂漿質量的影響[J].混凝土與水泥制品,2017(3):67-69. ZHANG Y X, GAO W J.Effects of Mobile Silo on Quality of Bulk Dry-mixed Mortar[J].China Concrete and Cement Products,2017(3):67-69.

化學發泡混凝土孔徑及吸水率影響因素正交試驗

張二猛

２０17年第3期

摘要

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摘要：通過正交設計試驗,分析研究了影響化學發泡混凝土孔徑大小的主要因素，其中增稠劑用量作用最為明顯；孔徑越小泡沫混凝土的吸水率越小。此外，孔徑的分布也會影響吸水率，分布越均勻泡沫混凝土吸水率越小。 Abstract: The main factors affecting the pore size of chemical foamed concrete are analyzed by orthogonal design test, and the dosage of thickener is the most obvious factor. The smaller pore size, the smaller water absorption of foam concrete. In addition, the pore size distribution also affects the bibulous rate, The more uniform distribution of foam concrete, the smaller water absorption.

張二猛.化學發泡混凝土孔徑及吸水率影響因素正交試驗[J].混凝土與水泥制品,2017(3):64-66. ZHANG E M.Orthogonal Test on Influencing Factors of Pore Size and Water Absorption of Chemical Foam Concrete[J].China Concrete and Cement Products,2017(3):64-66.

薄壁箱體現澆混凝土空心樓蓋的研究及工程應用

王晴1，陳道政1，趙天傳2

２０17年第3期

摘要

引用本文

摘要：結合工程實例，以某大型超市樓蓋為研究對象，利用有限元軟件YJK進行結構分析與設計，通過比較薄壁箱體現澆混凝土空心樓蓋和現澆混凝土實心樓板兩種樓蓋體系在荷載、跨度等相同參數條件下的經濟指標，提出薄壁箱體現澆混凝土空心樓蓋體系的適用范圍。通過對兩種樓蓋結構體系在相同條件下的混凝土和鋼筋用量的分析比較中可以得出：只要結構的跨度大于9m，無論所受活荷載大小，薄壁箱體現澆混凝土空心樓蓋結構體系均會具有更好的經濟性能，且其經濟性會隨著結構跨度和荷載的增加而更加明顯。 Abstract: Combining with the project example，a large supermarket floor is taken as the object of research, and the finite element software YJK is used to simulate and analyze. The applicable scope of cast-in-situ concrete hollow floor with thin-wall core box is proposed by comparing economic indicators of the cast-in-situ concrete hollow floor with thin-wall core box and cast-in-situ concrete solid slab under the same parameters such as load and span. Based on comparative analysis of the amount of concrete and steel of the two floor structure system under the same conditions, it can be concluded that when the structural span is more than 9m, no matter what size of the live load, the cast- in-situ concrete hollow floor with thin-wall core box will have better economic performance, and this kind of economic growth will be more apparent with the increase of structural span and load.

王晴,陳道政,趙天傳.薄壁箱體現澆混凝土空心樓蓋的研究及工程應用[J].混凝土與水泥制品,2017(3):60-63. WANG Q, CHEN D Z, ZHAO T C.Research and Engineering Application of Hollow Floor with Thin-wall Core Box[J].China Concrete and Cement Products,2017(3):60-63.

高溫熱處理對泡沫混凝土性能的影響

張雷1，李軍1,2，盧忠遠2，張玉蘋1

２０17年第3期

摘要

引用本文

摘??要：采用物理發泡方式制備了不同密度等級泡沫混凝土，研究了泡沫混凝土經高溫熱處理后的性能和結構演化。結果表明：隨熱處理溫度提高，各密度泡沫混凝土的質量損失增加、抗壓強度降低、吸水率增加，且均在800℃時趨于一致。密度等級對高溫熱處理后的泡沫混凝土性能影響較為明顯。在400℃以前，300～400kg/m3密度等級的泡沫混凝土質量和抗壓強度損失更大，吸水率增加更多；在600℃溫度處理后，各密度等級的泡沫混凝土基本性能均出現明顯下降；在800℃時，各密度等級泡沫混凝土基本性能趨于一致，質量損失為20%左右，質量吸水率為65%～70%，基本喪失抗壓強度。Abstract：Foamconcretewithdifferentdensitywasprepared,thepropertiesandstructuralevolutionoffoamconcreteafterhightemperatureheattreatmentwerestudied.Theresultsshowedthatthemasslossincreases,thecompressivestrengthdecreases,thewaterabsorptionincreaseswiththeincreasingofheattreatmenttemperatureandallthesetendtobeconsistentat800℃.Theeffectofdifferentdensityontheperformanceoffoamconcreteafterhightemperatureheattreatmentisobvious.Themasslossandwaterabsorptionincreasehigher,thecompressivestrengthdecreasehigherwhenthedensityoffoamconcreteis300～400kg/m3under400℃.Thebasicperformanceofdifferentdensityoffoamconcretedecreaseobviouslywhentheheattreatmenttemperatureis600℃.Allthesebasicperformancetendtobeconsistentat800℃,themassloseis20%,waterabsorptionis65%~70%andthecompressivestrengthisalmostzero.

張雷,李軍,盧忠遠,等.高溫熱處理對泡沫混凝土性能的影響[J].混凝土與水泥制品,2017(3):55-59. ZHANG L, LI J, LU Z Y,et al.Effects of High Temperature Heat Treatment on Performance of Foam Concrete[J].China Concrete and Cement Products,2017(3):55-59.

PVA和鋼纖維及鋼纖維之間混雜對混凝土彎曲韌性的影響

劉傳科，劉建忠，崔鞏，周華新，黃剛

摘要

引用本文

摘要：在已有單摻鋼纖維和合成纖維混凝土的研究基礎上，研究了聚乙烯醇纖維（PVA）和鋼纖維混雜，及兩種不同參數鋼纖維混雜的增韌、增強效果。結果表明，相對于單摻纖維，不同纖維混雜可使混凝土的彎曲強度及彎曲韌性明顯提高，荷載作用下混凝土彎曲荷載-撓度曲線的下降段明顯變緩，應變硬化現象更為明顯，混雜纖維可以產生協同增強效應。 Abstract: Based on the research of existing single steel fiber and synthetic fiber reinforced concrete，the effect of PVA fiber, steel fiber hybrid toughening effect and two different parameters of hybrid steel fiber on toughening， reinforcing were studied. The results showed that different characteristics of the fiber mixed together can significantly improve the bending strength of concrete and flexural toughness when compared with the single fiber，the flexural load-deflection curves of concrete falling speed is slow and the strain hardening phenomenon is more obvious，hybrid fiber can produce synergistic effects.

劉傳科,劉建忠,崔鞏,等.PVA和鋼纖維及鋼纖維之間混雜對混凝土彎曲韌性的影響[J].混凝土與水泥制品,2017(3):50-54. LIU C K, LIU JZ, CUI G,et al.Influence of PVA Mixed with Steel Fiber and Steel Fiber on Flexural Toughness of Concrete[J].China Concrete and Cement Products,2017(3):50-54.

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