第十期_2017_《混凝土與水泥制品》雜志社

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第十期

機制砂對濕拌砂漿性能的影響研究

邢光延1，葉建雄1，白光1，黃利平2

２０17年第10期

摘要

引用本文

摘??要：通過設計不同粗細和級配的機制砂，研究了機制砂細度模數和級配對濕拌砂漿性能的影響。結果表明，當機制砂細度模數在1.2～3.0時，隨著機制砂細度模數的增大，濕拌砂漿單方用水量減小，保水性下降，和易性和抗壓強度呈先提高后降低，干縮率呈先減小后增大的變化規律。當機制砂公稱粒徑在0.315mm以上顆粒的分計篩余相同時，隨著機制砂中小于0.315mm顆粒含量的增加，濕拌砂漿力學性能先提高后降低，干縮率先減小后增大?？刂茩C制砂中小于0.315mm細顆粒含量為30%，機制砂中大于1.25mm顆粒含量超過30%時，濕拌砂漿拉伸黏結強度明顯降低，干縮率顯著增大。Abstract:Throughthedesignofmanufacturedsandwithdifferentfinenessmodulusandgradation,theinfluenceoffinenessmodulusandgradationofmachine-madesandontheperformanceofwet-mixedmortarisstudied.Theresultsshowthatwhenthefinenessmodulusofsandisintherangeof1.2～3.0,withtheincreaseofthemodulusofsand,thewaterconsumptionofwet-mixedmortarisreduced,thewaterretentionisdecreased,theworkabilityandcompressionstrengthincreasesfirstandthendecreases,andtheshrinkageratedecreasesandthenincreases.Whengraderretainedpercentageofsandgreaterthan0.315mmisthesame,themechanicalpropertiesofthewet-mixedmortarareimprovedandthendecreases,andtheshrinkageratedecreasesfirstandthenincreaseswiththeincreaseofthecontentofparticleslessthan0.315mminthesand.Controlmachine-madesandlessthan0.315mmparticlecontentof30%,whenthecontentofgreaterthan1.25mmparticlesismorethan30%,thetensilebondstrengthofwet-mixedmortarisobviouslyreducedandtheshrinkagerateissignificantlyincreased.

邢光延,葉建雄,白光,等.機制砂對濕拌砂漿性能的影響研究[J].混凝土與水泥制品,2017(10):89-93. XING G Y, YE J X, BAI G,et al.Effects Study of Manufactured Sand on Performance of Wet-mixed Mortar[J].China Concrete and Cement Products,2017(10):89-93.

秸稈纖維對混凝土拉伸性能的影響

陳斌，盧玉斌，蘇實，羅丹

２０17年第10期

摘要

引用本文

摘要：設計了4批不同尺寸的秸稈纖維，將其均勻地摻入水泥砂漿中。通過劈裂拉伸試驗，研究了秸稈纖維對混凝土拉伸強度和劈裂韌性的影響。結果表明，混凝土中摻入秸稈纖維可控制基體混凝土裂紋的發展，從而提高劈裂韌性。此種混凝土適合應用于對承載力要求不大，但對韌性要求較高的建筑主體中，可實現就近取材，減少環境污染等目的。 Abstract: The four groups with different size of straw fiber are designed to mix evenly into the cement mortar. The effect of straw fiber on the recovery rate and cleavage toughness of concrete after cracking are studied by splitting experiments. The results show that the addition of fiber material in concrete can control the further development of concrete cracks in the matrix, so as to improve the crack resistance. This kind of concrete is suitable for building materials where the bearing capacity is not highly required but requiring high toughness, while achieving to use the nearest material and reduce environmental pollution.

陳斌,盧玉斌,蘇實,等.秸稈纖維對混凝土拉伸性能的影響[J].混凝土與水泥制品,2017(10):85-88. CHEN B, LU Y B, SU S,et al.Influence of Straw Fiber on Tensile Properties of Concrete[J].China Concrete and Cement Products,2017(10):85-88.

水下超緩凝混凝土在鉆孔咬合樁中的應用

曹良桂，何銳波，王世強，朱貴勛，曾憲森

２０17年第10期

摘要

引用本文

摘要：針對鉆孔咬合樁的施工工藝特點，采用自行研制的專用緩凝高效減水劑以及Ⅱ級粉煤灰和 S75 礦渣粉雙摻技術，配制出了具有良好的工作性能的水下超緩凝混凝土，混凝土緩凝時間達60h以上，3d強度不低于3MPa 、28d強度不低于設計強度等級。 Abstract: According to the construction characteristics of the bored lock piles, a new super retarding concrete is prepared by the set-retarding and super plasticizer, and mixed with Ⅱ fly ash and granulated blast furnace slag. The underwater super retarding concrete has good flow properties, the setting time can reach 60 hours when this product is contained in the concrete, the 3 days strength is not under 3MPa, and the 28 days strength can meet the design requirement.

曹良桂,何銳波,王世強,等.水下超緩凝混凝土在鉆孔咬合樁中的應用[J].混凝土與水泥制品,2017(10):82-84. CAO L G, HE R B, WANG S Q,et al.Application of Underwater Super-retarding Concrete in Bored Lock Piles[J].China Concrete and Cement Products,2017(10):82-84.

C50級自錨梁混凝土綜合蓄熱法冬期施工技術

江守恒1,2，董淑慧2，朱衛中3

２０17年第10期

摘要

引用本文

摘要：結合哈爾濱市陽明灘自錨式懸索橋自錨梁（過渡孔混凝土梁）C50級混凝土冬期施工所采取的綜合蓄熱法選擇與實施過程，分析了在嚴寒地區初冬時節C50級混凝土配合比設計思路、冬期施工混凝土防凍害綜合蓄熱養護方法以及亞高強級大體積混凝土冬期施工過程中的溫度控制與監測過程，提出了極端環境下重大工程混凝土冬期施工的技術條件，可供類似工程冬期施工參考。 Abstract：In this paper, a combination of the application of comprehensive thermal storage method and the winter construction implementation process in Grade C50 self-anchored suspension bridge of Harbin Yangming Beach Bridge is presented, the concrete mix design method of grade C50 concrete in severe cold area in early winter, the anti-frost damage comprehensive thermal storage method winter construction technology and the temperature control and monitoring process of sub-strength mass concrete in winter construction process are analyzed, the technology requirements of the winter construction of key project under an extreme environment were proposed, which provides reference for similar winter construction projects.

江守恒,董淑慧,朱衛中.C50級自錨梁混凝土綜合蓄熱法冬期施工技術[J].混凝土與水泥制品,2017(10):77-81. JIANG S H, DONG S H ,ZHU W Z.Construction Technology for Comprehensive Thermal Storage of C50 Self-anchored Concrete in Winter[J].China Concrete and Cement Products,2017(10):77-81.

超聲波測試矩形鋼管混凝土密實度的試驗研究

金瑞靈1，南峰1，伍勇華1，趙國紅2

２０17年第10期

摘要

引用本文

摘要：自制模擬現場鋼管混凝土缺陷模型，采用超聲波對測法測試不同脫黏狀態鋼管混凝土模型的密實度，對比分析了超聲波參數變化與鋼管混凝土缺陷之間的關系，找出了能夠準確判斷鋼管混凝土缺陷的方法與規律。結果表明，依據超聲波首波相位、聲時值和波幅的變化，可以判斷鋼管混凝土脫黏區域、空洞和斷層等缺陷。 Abstract: The model which of concrete filled steel tube defect is made, and the different debonding models are tested by non-metal ultrasonic. By analyzing the relationship between the defect and ultrasonic parameters, the method and regularity of judging concrete filled steel tube defect are found. The results show that on the basis of the change of the ultrasonic first phase, duration and amplitude, the concrete filled steel tube defect such as fault and debonding area and empty can be determined.

金瑞靈,南峰,伍勇華,等.超聲波測試矩形鋼管混凝土密實度的試驗研究[J].混凝土與水泥制品,2017(10):73-76. JIN R L, NAN F, WU Y H,et al.Experimental Research on Compactness of Concrete-filled Rectangular Tubular Tested by Non-metal Ultrasonic[J].China Concrete and Cement Products,2017(10):73-76.

陶?；炷僚渲萍皬姸仍囼炑芯? />
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<a href="/product/662.html" target="_parent" class="title"><i class="iconfont12"></i>陶?；炷僚渲萍皬姸仍囼炑芯?/a>

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<span class="attrValue"><i class="iconfont2"></i> 王昭恩，馮紹穎，林榮斌，簡學書，周祖偉</span>
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<span class="attrValue"> ２０17年第10期</span>
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<div class="zhai1"><i class="iconfont11"></i>引用本文</div>
<span class="newMs">摘要：現提倡綠色材料，節能環保新型建材，采用粉煤灰、陶粒等材料配制的陶?；炷?，可以降低結構自重，提高抗震性能。本文進行了正交試驗研究，得出對陶?；炷量箟簭姸扔绊懗潭鹊囊蛩赜纱蟮叫》謩e為水灰比、砂率、粉煤灰摻量，并進而得出最優配合比；對陶?；炷潦軌浩茐男螒B進行了分析，結果表明，水泥砂漿與陶粒的界面破壞和陶粒全截面斷裂破壞是陶?；炷潦軌浩茐牡闹饕螒B。
Abstract: Energy saving and environment protection in buildings and building materials are advocated nowadays. Using fly ash, ceramsite and other materials to prepare the ceramsite concrete can reduce weight and improve seismic performance.The compressive strength of ceramisite concrete is studied by orthogonal test, the conclusion shows that the order of factors of compressive strength is: water-cement ratio, sand rate and the mixing amount of fly ash, and then the optimal ratio is obtained. The failure mode of the ceramsite concrete is analyzed, and there are two kinds of failure modes, the interface failure of the cement mortar and the whole cross section rupture of the ceramsite.</span>

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<span class="attrValue3"> 王昭恩,馮紹穎,林榮斌,等.陶?；炷僚渲萍皬姸仍囼炑芯縖J].混凝土與水泥制品,2017(10):70-72.
WANG Z E, FENG S Y, LIN R B,et al.Study on Preparation and Strength Testing of Ceramisite Concrete[J].China Concrete and Cement Products,2017(10):70-72.</span>
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工業灰渣-陶粒新型混凝土配合比試驗研究

夏多田，呂開清，朱清峰，何明勝

２０17年第10期

摘要

引用本文

摘要：通過正交試驗研究了砂率、脫硫灰替代率、脫硫石膏替代率和微硅粉替代率四個因素對新型混凝土干表觀密度、軟化系數、導熱系數、絕干抗壓強度以及吸水率5個指標的影響。結果表明：各因素對新型混凝土5個試驗指標的影響順序為：脫硫石膏C>脫硫灰B>砂率A>微硅粉D。綜合平衡分析各因素對新型混凝土5個試驗指標的影響，確定了工業灰渣-陶粒新型混凝土的最優配合比。 Abstract: The influence of four factors on the dry density, softening coefficient, thermal conductivity, dry compressive strength and water absorption of new concrete were studied by orthogonal test. The four factors are the sand ratio, the replacement rate of desulfurization ash, the replacement rate of desulfurization gypsum and the replacement rate of silica fume. The results show that the influence order of all factors on the five test indicators of the new concrete was desulfurization gypsum C>desulfurization ash B> sand rate A> micro silica powder D. The optimal mixture ratio is determined by analyzing the influence of all factors on the five test indicators of the new concrete.

夏多田,呂開清,朱清峰,等.工業灰渣-陶粒新型混凝土配合比試驗研究[J].混凝土與水泥制品,2017(10):66-69. XIA D T, LYU K Q, ZHU Q F,et al.Experimental Research on Mix Proportion of New Industrial Solid Waste-ceramsite Concrete[J].China Concrete and Cement Products,2017(10):66-69.

肋形永久性拼接柱模板疊合混凝土短柱軸壓性能試驗研究

張笑鑫1,周乾2，張亞仿3，荀勇2，吳發紅2

２０17年第10期

摘要

引用本文

摘要：為確定肋形混凝土永久柱模板的肋方向、拼接方式和板縫處理方法對柱承載能力等影響，制作了橫肋和豎肋模板的整塊對縫拼接、整塊錯縫拼接、分塊錯縫拼接共3大類的干接縫、預埋鐵絲接縫、環氧樹脂接縫、同時用預埋鐵絲與環氧樹脂接縫處理的24組、48個短柱試件，并同時用傳統方法制作2個同規格短柱試件，進行承載力試驗。試驗結果表明，使用肋形永久性拼接柱模板疊合混凝土試件均高于傳統方法制作的試件，豎肋試件高于橫肋試件，錯縫拼接試件高于對縫拼接試件，整塊拼接試件高于分塊拼接試件，同時用鐵絲和環氧樹脂處理接縫整塊錯縫拼接短柱抗壓能力最強，但用預埋鐵絲方法處理接縫效果有限。試驗結果可為使用該種類模板提供參考。 Abstract: In order to determine the rib direction, the splicing method and the slab handling method of the rib-shaped concrete permanent column formwork, the whole piece of the stitch and the stitching a total of three major types of dry joints, embedded wire joints, epoxy joints, while with embedded wire and epoxy resin joints processing 24 groups, 48 short column test pieces, and at the same time with the traditional methods two specimens of the same size are used to carry out the bearing capacity test. The experimental results show that the composite specimens with the ribs permanent splicing column formwork are higher than those of the traditional method. The test piece of the vertical rib is higher than that of the transverse rib specimen, the whole piece of splicing test pieces is higher than the block splicing test pieces, while the use of wire and epoxy resin to deal with seams stitch stitching short column compression ability of the strongest, but with the embedded wire method to deal with the joint effect is limited. The testing results can provide a reference for using the type of formwork.

張笑鑫,周乾,張亞仿,等.肋形永久性拼接柱模板疊合混凝土短柱軸壓性能試驗研究[J].混凝土與水泥制品,2017(10):60-65. ZHANG X X, ZHOU Q, ZHANG Y F,et al.Experimental Study on Axial Performance of Composite Concrete Short Column of Ribbed Permanent Splicing Column Fromwork and Concrete[J].China Concrete and Cement Products,2017(10):60-65.

摻加明膠膜甘蔗葉纖維改善泡沫混凝土性能的研究

周永升2，張思原1，杜瑜欣1，李玉銘1

２０17年第10期

摘要

引用本文

摘要：研究了優化明膠膜甘蔗纖維的制備工藝，并將其摻入泡沫中改善泡沫的性能，再使用此泡沫制備泡沫混凝土，研究其對泡沫混凝土基本性能的影響，并對其內部微觀形貌進行觀察和分析。試驗結果表明，明膠膜甘蔗葉纖維改善了料漿固化沉降率、抗壓強度、導熱系數、干密度、吸水率及孔隙結構等泡沫混凝土的基本性能。 Abstract: The process for preparation of Gelatin Film Sugarcane Leaf Fiber (GFSLF) is optimized. The foamed concrete is prepared by adding GFSLF into the foam to improve the performance of foamed concrete, and scanning electron microscopy is used to observe the microstructure of foamed concrete. The results show that GFSLF is an effective fiber that can improve the performance of foamed concrete such as slurry sedimentation rate, compressive strength, thermal conductivity, dry density, water absorption and pore structure.

周永升,張思原,杜瑜欣,等.摻加明膠膜甘蔗葉纖維改善泡沫混凝土性能的研究[J].混凝土與水泥制品,2017(10):56-59. ZHOU Y S, ZHANG S Y, DU Y X,et al.Research on Foamed Concrete Properties Improved by Adding Gelatin Film Sugarcane Leaf Fiber[J].China Concrete and Cement Products,2017(10):56-59.

基于正交設計的玄武巖纖維增強混凝土配合比優化研究

劉子璐，陳新明，焦華喆，王云飛，陳峰賓，楊亦軒

２０17年第10期

摘要

引用本文

摘??要：基于正交設計研究多因素對玄武巖纖維（BF）增強混凝土（BFRC）力學性能的影響并優化其配合比。選取BF長度、BF摻量、減水劑、速凝劑作為試驗因素，通過極差分析得出各因素權重關系。利用SEM觀察BFRC微觀結構，分析BF對混凝土增強的微觀機理。結果表明，BF摻量為3kg/m3時，抗壓、抗折強度最大，摻量繼續增大，抗壓、抗折強度均明顯下降；抗壓、抗折強度隨BF長度增大先上升后下降，長度30mm時最佳；減水劑、速凝劑較前者相比對BFRC力學性能影響不明顯。各因素對BFRC7d抗壓與抗折強度影響權重一致，均為BF摻量>BF長度>減水劑>速凝劑，對BFRC28d抗壓、抗折強度影響權重分別為BF長度>BF摻量>速凝劑>減水劑及BF長度>BF摻量>減水劑>速凝劑。當纖維長度為30mm、纖維摻量為3kg/m3、減水劑為0.7%、速凝劑為10%時，BFRC相對于素混凝土的28d抗壓和抗折強度分別提高了21.7%和37.8%。Abstract：Basedontheorthogonaldesign,theinfluenceofmultifactorsonthemechanicalpropertiesofBFRCwasstudiedandthemixtureratiowasoptimized.TheBFlength,BFcontent,waterreducingagentandacceleratorwereselectedasthefactors,andtheweightrelationofeachfactorwasobtainedbyrangeanalysis.ThemicrostructureofBFRCwasobservedbySEM,andthemicromechanismofBFonconcretewasanalyzed.TheresultsshowthatwhenthedosageofBFis3kg/m3,themaximumcompressiveflexuralstrengthareobtained,thenthecompressivestrengthandflexuralstrengthbothdecreasewhenthedosageofBFincreases.ThecompressivestrengthandflexuralstrengthincreasefirstandthendecreasewiththelengthofBFincreases,andthebestlengthofBFis30mm.ThereducingagentandacceleratingagenthavelittleeffectonthemechanicalpropertiesoftheBFRC.Theinfluenceofvariousfactorsonthe7dcompressiveandflexuralstrengthofBFRCisconsistent:BFdosage>BFlength>waterreducingagent>accelerator.Theinfluenceofvariousfactorsonthe28dcompressiveandflexuralstrengthisBFlength>BFdosage>acceleratingagent>waterreducingagentandBFlength>BFdosage>waterreducingagent>acceleratorrespectively.Whenthefiberlengthis30mmandthefibercontentis3kg/m3,thewaterreducingagentis0.7%,theacceleratoris10%,the28dcompressiveandflexuralstrengthofBFRCcomparedwithplainconcretewereincreasedby21.7%and37.8%.

劉子璐,陳新明,焦華喆,等.基于正交設計的玄武巖纖維增強混凝土配合比優化研究[J].混凝土與水泥制品,2017(10):51-55. LIU Z L, CHEN X M, JIAO H Z,et al.Optimization Study on Mix Proportion of Basalt Fiber Reinforced Concrete Based on Orthogonal Design[J].China Concrete and Cement Products,2017(10):51-55.

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