YDS高抗冲磨环氧砂浆的研究与应用

在YDS高渗透环氧化学灌浆材料的基础上,开发了一类新型高抗冲磨环氧砂浆。介绍了YDS高抗冲磨环氧砂浆的制备方法,探讨了环氧基液和环氧砂浆的主要性能。结果表明,YDS环氧砂浆不仅具有优异的抗渗耐腐蚀性能,而且其抗冲耐磨性能也非常好,抗冲磨强度最高达到400h/(kg/m2)以上,应用前景广泛。     

中化—798化学灌浆材料的研制

研制了一种高渗透性能的中化—798化学灌浆材料,它是一种补强固结浆材。该浆材为呋喃—环氧体系系列灌浆材料,但并不是该体系的某一固定配方,而是组成浆材的各组份在最佳选用范周内的系列配方的统弥。其主要组成为环氧树脂、糠醛、丙酮、二乙烯三胺、改性剂 D_1和改性剂 D_2。该浆材可灌性良好,可灌入低渗透性(10~(-8)厘米/秒)软弱地层,并使其固结,力学性能据地质条件和技术指标的不同要求在一定范周内变化,聚合体或固砂体的抗压强度达500～800公斤/厘米~2,可达到工程质量的要求。     

高压深孔YDS环氧化学灌浆技术在大岗山水电站Ⅴ_1类辉绿岩脉地层帷幕灌浆科研试验中的应用

采用高压深孔YDS环氧化学灌浆技术,对大岗山水电站Ⅴ1类辉绿岩脉地层帷幕进行现场试验,总结出用水泥/化学复合灌浆对该帷幕大规模施工的设计参数及工艺措施。试验结果表明,用水泥灌浆与YDS高渗透性环氧化学灌浆材料灌浆组成的水泥/化学复合灌浆方式在大岗山水电站能够形成可靠的防渗帷幕,该工艺技术是可行的。     

大岗山水电站防渗帷幕科研试验区的化灌设计与选材

针对四川大岗山水电站特殊的地质条件,采用YDS高渗透环氧化学灌浆材料,对Ⅴ1类辉绿岩脉开展水泥/化学复合灌浆的室内模拟试验和现场试验,分析灌浆参数、施工工艺、浆液扩散范围等有关技术问题,考察了化学灌浆的可行性,提出了合理的工艺参数。研究结果表明,YDS高渗透环氧化学灌浆材料灌浆与水泥灌浆组成的复合灌浆方式完全能够满足大岗山水电站防渗帷幕工程的要求,其化灌设计经济、合理,工艺操作可行,符合化学灌浆施工规范,现场试验效果满足设计要求。     

水玻璃灌浆材料和工艺

<正> 水玻璃浆材水玻璃是古老的化学灌浆材料,迄今已有50多年的历史。该浆材米源广、品种多、价格低、无毒、凝固时间和固结体强度可以调节,防水性能良好,还可以与水泥浆混合使用,能够满足不同工程施工的要求,广泛应用于矿井、隧道、涵管、深层地基和油井等地下工程的堵水、防渗、基础加固和强化采油工程的处理。水玻璃浆材是硅酸钠的水溶液,含有原硅酸钠(2Na_2O·SiO_2)、正硅酸钠(Na_2O·SiO_2)和二硅酸钠(Na_2O·2SiO_2)等。由于硅酸钠溶液的pH值可以调节,当pH<9时,会发生缩合作用,生成直链的聚合物凝胶。     

YDS高渗透环氧防水抗渗材料的耐腐蚀研究

通过力学性能测试、冻融循环重量变化测试、耐化学介质重量变化测试等方法,对YDS-40高渗透环氧化学灌浆材料固结体和YDS-5高渗透防水抗渗材料涂层的耐腐蚀性能进行了详细研究,结果表明,YDS系列高渗透防水材料的耐腐蚀性能优异,能够应用于包括水电站、海港、垃圾填埋场和矿山等不同环境的建筑工程中。     

流塑土层的化学灌浆

本文介绢一种因流塑状土层引起建筑物基础下沉的化学灌浆处理情况。采用了水泥—水玻璃系的化学浆材。灌浆结果阻止了流塑淤泥的流动,并使已经沉陷和倾斜的房屋建筑得到复原。     

聚氨脂改性环氧树脂注浆材料的研究

本研究是以聚醚型聚氨酯改性环氧树脂作为混凝土裂缝修补注浆材料。这种改性的环氧树脂注浆材料不仅弹性、韧性得到大大提高,而且仍具有较高的抗压与抗拉强度、高粘结性。本文讨论了该浆材不同溶剂、不同交联剂用量对浆液性能的影响,并用红外光谱对改性环氧树脂注浆材料进行了结构分析。     

流塑状粘土溶泥的化学灌浆

本文较详细地介绍了一种流塑状粘土在开挖盐析池时造成滑坡、塌方的化学灌浆处理情况。采用了水泥系的化学浆材。灌浆结果不但阻止了粘土的流动和塌方现象,而且使附近已经沉陷的地面和倾斜的建筑物得到恢复和纠正,确保了生产和施工安全。这种灌浆方法被认为是一种工艺简单、快速、高效、经济的实用方法。     

胜利煤液化油煤浆表观黏度的影响因素研究

采用高温黏度计测定了胜利褐煤液化油煤浆在常压加热条件下的表观黏度,考察了煤浆质量分数、煤粉粒径、溶剂性质以及温度、剪切时间、剪切速率、溶胀等因素对煤浆体系表观黏度的影响。在常压室温至350℃的范围内,比较了胜利煤在起始溶剂和循环溶剂两种煤浆体系中的表观黏度。研究结果表明,胜利液化油煤浆体系是一种非牛顿流体,随着温度的升高,煤浆体系的黏度呈现先快速下降,然后基本保持不变,最后又逐渐上升的趋势。煤浆黏度保持不变的温度区间和黏度开始出现增加的温度随着煤浆的质量分数、煤粉的粒径以及配制煤浆所用溶剂的不同而不同。     

氢化丁腈橡胶/聚甲基丙烯酸镁/有机蒙脱土纳米复合材料制备及其耐介质老化性能

采用原位聚合和混炼插层相结合技术制备了氢化丁腈橡胶/聚甲基丙烯酸镁/有机蒙脱土(HNBR/PMgMA/OMT)纳米复合材料,通过XRD,SEM和TEM等测试方法研究了HNBR/PMgMA/OMT纳米复合材料的结构、形态和性能.PMgMA离子簇与未反应完全的MgMA单体形成纳米-微米共存形态结构,PMgMA对HNBR有显著的增强效果,HNBR/PMgMA/OMT纳米复合材料具有良好的加工性能、物理机械性能和耐介质老化性能.TEM结果显示MgMA/OMT并用有助于OMT剥离分散,有机蒙脱土在硫化胶中形成以剥离和插层为主、反插层和未插层共存的微观结构;SEM显示当MgMA/OMT用量为20/10份时能明显改善复合材料的界面结合,此时纳米复合材料的拉伸强度、扯断伸长率和扯断永久变形分别为30.2 MPa,520%和30%;同时具有优异的耐热空气和耐油老化性能,耐热水性能也明显改善,在165℃的热空气、水和油中长期老化14天的老化系数分别达到0.61,0.63和0.84,其耐介质老化性能明显好于炭黑增强HNBR硫化胶及HNBR/PMgMA复合材料.良好的蒙脱土片层分散结构是提高HNBR/PMgMA/OMT纳米复合材料耐介质老化性能的主要原因.     

Improving the aging resistance of styrene-butadiene-styrene tri-block copolymer modified asphalt by addition of antioxidants

The aging properties of base asphalt and styrene-butadiene-styrene tri-block copolymer (SBS) modified asphalts (PMA) are evaluated using Fourier Transform Infrared (FTIR) spectroscopy. An aging cell fitted to the FTIR microscope was used to continually and directly study the oxidation of the PMA. In particular, Attenuated Total Reflectance, ATR, with a zinc selenide prism was used to quantify the changes in the spectra of the PMA before and after thin film oven test (TFOT). The effect of a small amount (1 wt%) of some modifiers, zinc dialkyldithiophosphate (ZDDP), zinc dibutyl dithiocarbamate (ZDBC) or naphthenoid oil, on the chemical and physical properties of the PMA was studied. The modification extent of the modifiers increases in the order: oil, ZDBC, ZDDP. With the aging of the PMA, carbonyl groups formed and the intensity of the absorption peak at 965 cm⁻¹ (the characteristic peak of SBS) decreased. Antioxidants, ZDDP or ZDBC modified PMA are resistant to the formation of carbonyl to some extent, indicating the improvement of aging resistance of the PMA by the addition of the antioxidants. ZDDP and ZDBC as antioxidants can retard the oxidation of the PMA through the inhibition of peroxides and radical scavenging. Furthermore, ZDDP in a liquid state at room temperature acts as plasticiser, giving rise to a good aging resistance of PMA.     

水泥—水玻璃灌浆在庄基础建筑物中的应用

本文介绍水泥—水玻璃灌浆加固桩基础建筑物的设计,加固方法和原理。对加固的效果作了较为详细的分析。结合中山涤纶厂成品原料仓库和江门市某商品住宅楼两个工程实例,进一步说明水泥—水玻璃灌浆在桩基础建筑物加固的有效性。     

Degradation of physicomechanical properties of epoxy nanocomposites with carbon nanotubes upon heat and humidity aging

The dependence of the physicomechanical properties of epoxy nanocomposites subjected to heat and humidity aging on the type of covalently functionalized carbon nanotubes and on the uniformity of their distribution in the epoxy matrix was studied. Two types of carbon nanotubes were used: those modified with carboxy and amide groups. The elastic modulus, bending deflection, and ultimate bending strength for the initial epoxy nanocomposites with carbon nanotubes and for those subjected to heat and humidity aging were determined. The epoxy binders modified with carboxylated carbon nanotubes are more resistant to the action of aging factors. The presence of aggregates of carboxylated carbon nanotubes in the epoxy matrix positively influences the preservation of physicomechanical properties of the composite subjected to heat and humidity aging. Microscopic examination revealed structural features of the epoxy nanocomposite and their effect on the resistance of the composite to the heat and humidity aging.     

Ce-Zr-La-Al2O3的制备及负载的单Pd三效催化剂

采用共沉淀和浸渍两种方法制备了Ce-Zr-La-Al2O3(CZLA),对其进行了N2吸附和X射线衍射分析.以CZLA为载体制备了2%Pd/CZLA三效催化剂,并对催化剂进行了程序升温还原和活性测试.结果表明,两种方法制备的CZLA均具有较好的结构、织构和储氧性能,共沉淀法制备的CZLA具有更好的抗老化性能.以CZLA为载体所制备的单Pd三效催化剂表现出低的起燃温度、优异的三效性能,特别是优异的转化NO性能及抗老化性能.     

环氧灌浆材料在莞惠城际轨道工程GZH-5标渗漏水治理中的应用

针对当前聚氨酯灌浆材料在渗漏水治理中存在的问题,提出了依靠堵水环氧灌浆材料和高渗透环氧灌浆材料进行渗漏水治理的新思路。环氧类灌浆材料既能够对混凝土裂缝等缺陷进行修复,也能够封堵渗漏水,希望修复后的缺陷能够保持和恢复混凝土结构的耐久性。     

多苯基芳基类硅化合物作为硅聚合物热稳定剂的研究

本文通过Diels-Alder反应合成了四苯(基)苯基三乙氧基硅烷及四苯(基)苄基三乙氧基硅烷,产率均为96％左右。并作了下列耐热性研究:(1)把两种化合物分别作为硅橡胶混炼时的热稳定剂,所得硅弹性体其热老化稳定性及机械强度均较好。(2)把两种化合物分别作为室温硫化硅橡胶固化时的交联剂,所制得的胶片在350℃老化10小时仍保持弹性。(3)两种化合物分别与H_3BO_3反应,制得耐热性硅硼树脂,是一种优良的耐高温涂料。     

The effect of ozone and high temperature on polymer degradation in polymer core composite conductors

The next generation High Temperature Low Sag Polymer Core Composite Conductors can experience harsh in-service environments including high temperature and highly concentrated ozone. In some extreme cases, it is possible that the conductors will experience temperatures of up to 180 °C and ozone concentrations as high as 1% (10,000 ppm). Therefore, the goal of this work was to understand the degradation mechanisms in a high temperature epoxy, which could be used in the conductors at temperatures as high as 140 °C in the presence of 1% ozone. Then, the combined aging data for the epoxy were compared to the aging results from room temperature aging in 1% ozone and aging in air at 140 and 180 °C. In addition, important but limited aging testing was also performed on a set of PCCC rods to verify some of the observations from the neat resin experiments. It was determined that the mass loss, volumetric shrinkage, and flexural strength reductions of the epoxy aged at 140 °C were driven almost entirely by temperature and that the effect of 1% ozone at that temperature can be thought of as insignificant for aging times up to 90 days. The composite rods displayed postcuring at 140 °C and were also unaffected by the presence of ozone at aging time lengths of 90 days. Up to this time aging the polymer and composite specimens in atmospheric 180 °C resulted in the most drastic changes in both physical and mechanical properties, except viscoelasticity where the polymer specimens aged at 140 °C with 1% ozone showed the greatest increase in the storage modulus. The least amount of degradation to the materials was found to occur after aging at room temperature in 1% ozone.     

广州开发区SDK-D-2地块砌石挡土墙灌浆处理试验工程施工总结

针对广州开发区SDK-D-2地块砌石挡土墙软弱地层,采用单液静力注浆进行灌浆加固。详细论述了灌浆处理工程中的材料及工艺设备、工艺参数、工艺流程,异常情况技术处理及检测措施,分析了灌浆效果。实践表明处理方法有效,达到了工程设计标准。