摘 要：为更广泛了解碱矿渣水泥耐高温性能，选用水玻璃和氢氧化钠分别激发昆钢矿渣，探究两种激发剂作用下碱矿渣水泥高温劣化程度，以及在不同碱含量、不同水胶比和不同水玻璃模数时强度随温度的变化规律。实验结果表明，两种碱激发昆钢矿渣水泥随着温度升高强度均较大幅度降低，耐高温性能不佳。在两种激发剂分别作用下，不同碱含量时常温强度越高的碱矿渣水泥高温强度降幅均越大，不同水胶比时碱矿渣水泥高温强度降低幅度均与温度区段相关。在水玻璃为激发剂作用下，水玻璃模数越大，碱矿渣水泥高温强度降幅越小。在相同碱含量和水胶比下，水玻璃激发昆钢矿渣水泥耐高温性能明显好于氢氧化钠激发。 Abstract: In order to understande the comprehensively high temperature-resistance performance of Alkali-activated Slag (AAS), Water Glass (WG) and Sodium Hydroxide (SH) are used to activate slag from Kunming Iron and Steel Co.,Ltd (KIS), high-temperature deterioration degree of AAS by the two activators, and the law of compressive strength varying with temperature for different alkali content, water-binder ratio and WG modules are studied. Experimental result shows that the strength of AAS from KIS has a great drop with high temperature increasing, and has not good temperature-resistance performance. For AAS with different alkali content, the higher the strength at room temperature, the more sharperly the strength declines at high temperature. For AAS with different water-binder ratio, the degree of the strength declining is related to temperature. The bigger the WG moduleis, the better temperature-resistance performance of AAS is. At the case of the same alkali content and water-binder ratio, temperature-resistance performance of AAS by WG is better than that by SH.

万夫雄,鲁继宣,田尚理,等.碱激发昆钢矿渣水泥高温抗压强度实验研究[J].混凝土与水泥制品,2018(3):101-104. WAN F X,LU J X,TIAN S L,et al.Experimental Study on Compressive Strength of Alkali-activate Slag (AAS) Cement from Kunming Iron and Steel Co., Ltd.after High Temperature[J].China Concrete and Cement Products,2018(3):101-104.

摘  要：对川煤某集团洗煤尾泥的物质成分特点及其在不同条件下煅烧磨细后产物的火山灰活性进行了研究，对掺不同煅烧条件下的煤泥所制水泥净浆用TG-DTG法分析了煅烧条件与其火山灰活性的关系。结果表明，该洗煤尾泥主要由高岭石和伊利石组成，并含有少量的石英和方解石，其烧失量为31.3%，发热量为1875kcal/kg；当煅烧温度为850℃，保温1.5h，磨细至D90=20μm左右时，其28d活性指数达97%左右，具有良好的火山灰活性，可用于水泥活性混合材和混凝土活性掺合料；对掺不同活性指数的煅烧煤泥所制水泥净浆试样进行TG-DTG分析表明，水泥净浆在不同温度区域的失重情况与煅烧煤泥活性指数变化规律一致。Abstract:Thecharacteristicsofthematerialcompositionandthepozzolanicactivitywhichaftercalcinationfinegrindingunderthedifferentconditionsofthecoal-washingtailingsintheSichuan-coalGroupwerestudiedsystematically,andtherelationshipbetweencalcinationconditionandpozzolanicactivitywasanalyzedbyTG-DTGmethodofcementpasteunderthedifferentcalcinationconditions.Theresultsshowthatthecoal-washingtailingsmainlyconsistofkaoliniteandillite,andcontainasmallamountofquartzandcalcite,thecalorificlossis31.3%,theheatis1875kcal/kg;whenthecalcinationtemperatureis850℃,thethermalinsulationis1.5h,theactivityindexof28disabout97%whenmilledtoD90=20μm,withbetterpozzolanicactivity,itcanbeusedincementactivemixtureandconcreteactiveadmixture.TheTG-DTGanalysisofcementpastesamplesmadefromcalcinedslimewithdifferentactivityindexshowsthattheweightlossofslime-cementslurryindifferenttemperatureregionsisconsistentwiththatofcalcinedslimeactivityindex.

刘冬雪,向香源,胡俊阳,等.川煤某集团煤泥特征及其煅烧产物火山灰活性研究[J].混凝土与水泥制品,2018(3):96-100. LIU D X,XIANG X Y,HU J Y,et al.Research of Coal Slime Characteristic of Sichuan-coal Group and Pozzolanic Activity of Its Calcined Products[J].China Concrete and Cement Products,2018(3):96-100.

摘 要：钻孔灌注桩是众多桥梁及其他工程施工的基础，如果钻孔灌注桩的孔位及钢筋骨架中心偏位较大，则会导致桥梁上部结构对钻孔桩和墩柱产生较大的偏心压力，从而降低钻孔灌注桩的承载能力。本文通过对钻孔灌注桩孔位及钢筋骨架偏位原因进行深入研究，提出了一种新型快捷易操作并能准确确定孔位和钢筋骨架中心的定位技术，可为钻孔灌注桩孔位及钢筋骨架定位施工提供参考。 Abstract: Bored piles are the foundation of numerous bridges and other construction projects. If the pile and reinforcement cage position deviation of bored pile is larger, the bridge superstructure will cause greater eccentric pressure on the bored pile and column, which can reduce the bearing capacity of the bored pile. Through in-depth study on the reasons for the pile and reinforcement cage position deviation of bored piles, a new type of positioning technology determining the coincidence of holes and reinforcement cage center is proposed, whcih is easy to operate and precise. It has a good effect on a bridge project in Xuzhou and can provide a reference for the hole and reinforcement cage positioning construction of bored piles

谷文汉,温小非,赵如泉,等.钻孔灌注桩孔位及钢筋骨架新型定位技术研究[J].混凝土与水泥制品,2018(3):93-95. GU W H,WEN X F,ZHAO R Q,et al.Study on Hole Position of Bored Pile and New Type Positioning Technology of Reinforcement Cage[J].China Concrete and Cement Products,2018(3):93-95.

摘 要：结合拟建的某航道斜坡式护岸工程，对PCC桩加固方案的设计、数值计算验证、计算结果对比等方面进行了分析，结果表明，采用该桩型对航道护岸工程进行软基加固处理，在有效节省造价的同时，岸坡具有良好的稳定性，且加固区的位移量较小，能较好地满足工程的要求。Abstract:Combinedwithengineeringexampleofachannelslopereinforcement,thedesign,numericalcalculationandcalculationresultscomparisonofPCCpileschemeareanalyzed.TheresultsshowthatthechannelslopeisstablebyusingPCCpilescheme.Meanwhile,theschemeiseconomicalandthedisplacementofthereinforcedareaissmall,andcanmeettherequirementoftheengineeringapplication.

高德清.PCC桩加固航道边坡方案研究[J].混凝土与水泥制品,2018(3):89-92. GAO D Q.Scheme Research on Channel Slope Reinforced with PCC Pile[J].China Concrete and Cement Products,2018(3):89-92.

摘 要：在参加省级混凝土外加剂检测能力验证过程中发现：同一混凝土外加剂样品，不同单位的检测结果偏差较大。本文通过对检测全过程的分析，找出了影响检测结果的多个因素，提出了需要关注的关键过程和操作，可减少检测误差，提高混凝土外加剂减水率检测结果的准确性。 Abstract: After taking part in the verification process of testing capability of concrete admixtures at provincial level, it is found that the detection results of the same concrete admixtures by different enterprise has large deviation. By analyzing the whole detection process, many factors that affect the results are found, the key processes and operations which are needed to be concerned are put forward. Detection error is reduced and the accuracy of the test results of concrete admixture water reducing rate is improved.

高峰.混凝土外加剂减水率检测误差分析[J].混凝土与水泥制品,2018(3):86-88. GAO F.Analysis on Testing Error of Water Reducing Rate of Concrete Admixture[J].China Concrete and Cement Products,2018(3):86-88.

摘 要：混凝土渗透性是决定混凝土耐久性的重要因素，是我国工程建设质量见证取样强制控制的检测项目，但一直缺乏有效的现场检测方法，只能通过送样试块在试验室试验控制，与实际工程质量有较大偏差。本文利用Torrent透气法（一种新型混凝土渗透性检测技术），与传统的水压渗透试验方法进行对比试验研究，建立了Torrent透气法最大压力差ΔPmax与渗水高度法渗透深度Lw的相互关系，论证了Torrent透气法应用于混凝土抗渗性现场无损检测的可行性。 Abstract：The concrete permeability is an important factor to the durability of concrete and is the compulsory control testing project of the witness sampling in China, but it lacks effective on-site detection method, which must be tested in laboratory, thus there is a large deviation with the actual project. Torrent ventilation method is used to be compared with the experimental research laboratory pressure permeation test method, the relationship between maximum differential pressure ΔPmax of Torrent breathable and penetration depth Lw of water penetration height method are established, which has demonstrated the feasibility of Torrent ventilation method applied on messuring the permeability of concrete.

蒋锐,薛晨曦,杨戈,等.混凝土抗渗性能现场检测技术试验研究[J].混凝土与水泥制品,2018(3):82-85. JIANG R,XUE C X,YANG G,et al.Experimental Study on On-site Testing Technology of Concrete Permeability[J].China Concrete and Cement Products,2018(3):82-85.