改善安山岩沥青混合料压实与水稳定性能研究

安山岩集料棱角性丰富,难压实,属于中性集料,水稳定性差,给安山岩的级配设计和推广使用造成了困难。根据安山岩物理化学性质的特殊性,提出了掺配部分石灰岩细集料代替安山岩细集料方法来设计安山岩沥青混合料。采用该方法生产的安山岩沥青混合料,具有良好的压实性能和水稳定性。     

On the polymer modified cement mortars with different lightweight aggregates in marine environment

Having a light weight is a design objective for offshore and coastal structures and in order to reach this aim, use of lightweight concrete consisting lightweight aggregates and polymers is a feasible solution. In this study, materials obtained from locally available crushed volcanic scoria as main aggregate and some additional lightweight aggregates with ceramic, perlite and andesite as well polymers were used in the mixtures with different proportions (totally 14 mixtures) to propose feasible alternatives for coastal structure designers. To evaluate the design performances of the mixtures, their properties such as density, cylinder compressive strength, capillarity, loss of mass under the effects of the agents in marine environment such as sodium sulphate and sodium chloride were obtained experimentally. It was found that mixtures with scoria aggregates showed more favourable results and additional aggregates gave flexibility to the designer to lower densities up to 40 % ‐ 60 % of normal‐weight mixtures. Polymer modification also improved the performance of the related materials.     

北三台石炭系火山岩示底构造及与油气的关系

准噶尔盆地北三台火山岩中的示底构造类同于碳酸盐岩发育的示底构造,主要发育于火山岩的气孔和自碎缝中,其下部主要为渗滤泥沉积,上部常为结晶的钠沸石或其他自生矿物,二者之间界面平直。火山岩示底构造的发现,对火山岩岩层的顶底识别、岩相划分及油气勘探具有重要意义。发育示底构造的岩层其物性相对较优、溶蚀孔发育,产能高,均为油层和含油水层。     

二连盆地乌兰花凹陷特低渗安山岩储层的有效性评价

针对二连盆地乌兰花凹陷安山岩储层的特性认识不清、有效储层划分不准确的问题,利用岩心薄片、黏土矿物分析、物性测试以及核磁共振实验等手段开展了岩石储集空间特征、岩石蚀变程度、测井响应特征分析。在此基础上,重点开展了基于核磁共振实验的安山岩储层有效孔隙度计算模型研究,开发了相适应的测井解释评价模块,并结合常规测井和试油结果建立了安山岩储层的分类标准。结果表明:安山岩储集空间具有发育"微孔"、"杏仁孔"双孔隙的特征,且以微孔为主;根据不同蚀变程度所建立的安山岩有效孔隙度计算模型具有很高的精度,平均绝对误差为0.16%,平均相对误差为19.40%;新测井解释储层分类标准在实际应用中与试油结论具有很好的一致性,有利于乌兰花凹陷安山岩有效储层的精确划分,并为该地区开发方案的设计及可采储量评价提供技术支持。     

Superpave沥青混合料组成设计研究

采用旋转压实方法对安山岩集料Superpave25沥青混合料进行配合比设计。通过级配优选和油石比优选及性能验证等步骤,最终设计出级配合理、性能优良的Superpave25沥青混合料。     

安山岩沥青混合料的应用研究

内蒙兴安盟地区安山岩比较丰富,但是由于安山岩属于中性石料,其粘附性和水稳定性都比较差,给安山岩在沥青路面中的应用带来了很大的困难。为了有效利用安山岩,对安山岩沥青混合料采用了合理的改善措施,并对其水稳定性能和高温稳定性能进行了研究分析,改善后的安山岩沥青混合料在这两方面都有显著提高。     

Mechanical and microstructural properties of waste andesite dust-based geopolymer mortars

Waste andesite dust (WAD) occurs during sawing and other stone dressing processes of andesite stone. The disposal of WAD may cause storage and environmental pollution problems. The use of WAD in geopolymer production may be a solution to these problems. The mechanical and microstructural properties of geopolymer mortars synthesized from WAD were investigated in this work. To investigate these properties, the geopolymer mortars were manufactured using WAD with different molarity variations of NaOH as alkali-activator. The produced fresh WAD-based geopolymer mortars were cured at 100 °C in three different periods (12, 24, and 48 h). The results revealed that the ultrasonic pulse velocity (U_pv), flexural strength (f_fs), compressive strength (f_cs) of WAD-based geopolymer mortars increased as increasing NaOH molarity until reaching an optimum concentration (12 M for this work). Curing periods also significantly affected the mechanical and microstructural properties of WAD-based geopolymer mortars. The results showed that the higher f_fs and f_cs values can be obtained with a longer curing periods. Moreover, considering overall performance analysis, geopolymer synthesis with WAD promises a solution for sustainable mortar production and waste elimination.     

应用风化安山岩料筑坝及其施工质量控制

十三陵抽水蓄能电站上池主坝施工初期，池盆开挖出的坝料力性能较差不能上坝，坝脚部位弱风化料源一时出现严重短缺的局面，经对开挖出的坝基岩性分析和池盆风化料所作的试验成果，进行了第一次坝体断面优化；主坝防渗结构由沥青混凝土面板改为钢筋混凝土面板以后，又进行了第二次填料分区优化，使池盆开挖料得到合理使用，满足了筑要求；坝体于１９９３年９月填筑完毕，填筑质量合格率９８．１％，达到优良标准，目前坝体沉体变形已     

牙轮钻头在钻孔灌注桩进入硬岩中的应用研究

以安山岩为例,总结和分析了安山岩的强度特性以及组合牙轮钻头的破岩机理.由于中微风化安山岩岩质硬,采用滚刀钻头破岩效果差,施工进度慢.结合南京汇达广场桩基工程地质情况,提出了进入安山岩时,采用组合牙轮钻头代替滚刀钻头.此法大大提高了施工进度,降低了工程成本.     

二连盆地乌兰花凹陷特低渗安山岩储层的有效性评价

针对二连盆地乌兰花凹陷安山岩储层的特性认识不清、有效储层划分不准确的问题，利用岩心薄片、黏土矿物分析、物性测试以及核磁共振实验等手段开展了岩石储集空间特征、岩石蚀变程度、测井响应特征分析。在此基础上，重点开展了基于核磁共振实验的安山岩储层有效孔隙度计算模型研究，开发了相适应的测井解释评价模块，并结合常规测井和试油结果建立了安山岩储层的分类标准。结果表明：安山岩储集空间具有发育"微孔"、"杏仁孔"双孔隙的特征，且以微孔为主；根据不同蚀变程度所建立的安山岩有效孔隙度计算模型具有很高的精度，平均绝对误差为0.16%，平均相对误差为19.40%；新测井解释储层分类标准在实际应用中与试油结论具有很好的一致性，有利于乌兰花凹陷安山岩有效储层的精确划分，并为该地区开发方案的设计及可采储量评价提供技术支持。