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水泥稳定半刚性基层材料强度影响因素的研究 总被引:1,自引:0,他引:1
结合某公路沿线的地材特点,对路面基层材料无侧限抗压强度的几种影响因素:集料种类、水泥掺量、细颗粒(〈0.075mm)含量、水泥品种进行了研究:认为级配是影响强度的主要因素,其次是水泥的品种,集料的破碎面的粗糙度和棱角性对强度的影响也比较大,水泥稳定类强度随水泥掺量的增加呈较好的线性递增关系;集料里太大的细颗粒含量对强度的形成不利,但适当的细集料含量有利于强度的形成;AGS稳定的粒料强度比矿渣水泥和复合水泥稳定粒料的强度提高约10%~15%。因此在公路建设中,将集料级配控制在合适的范围和选择合适的水泥品种十分重要。 相似文献
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对水泥稳定粒料的抗裂性和二灰稳定粒料的早强技术进行了深入的和系统的研究。对于水泥稳定粒料而言,详细研究了原材料、配合比、施工工艺与质量控制等方面,提出了通过优选原材料、优化配合比、优化施工工艺和加强施工质量控制等措施,来提高基层材料的抗裂性,避免和减少裂缝的产生。对于二灰稳定粒料而言,重点研究了原材料、配合比及掺磷石膏对二灰稳定粒料的强度和其它路用性能的影响等方面,得出了掺磷石膏后二灰稳定粒料的早期强度大幅提高,其它路面性能有较大改善的结论,从而证明在二灰稳定粒料中掺入工业废渣磷石膏是提高其早期强度的一种经济有效的方法。 相似文献
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水泥稳定粒料基层材料具备水稳定性好、刚度大、整体性强、承载能力强和经济适用等诸多优点,故成为目前高级路面施工中的主选材料。在基层施工中应用水泥稳定粒料,可提高路面的整体质量,延长公路的使用寿命。本文针对水泥稳定粒料优势,探讨影响水泥稳定粒料基层强度的因素,并重点分析水泥稳定粒料基层施工中的质量控制技术,以确保基层施工质量。 相似文献
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《施工技术》2018,(23)
基于不同养护龄期内的无侧限抗压强度试验、劈裂试验、抗压回弹模量试验和间接拉伸疲劳试验,研究成型方式对水泥稳定碎石混合料宏观力学性能和疲劳性能的影响;基于工业CT的无损检测技术和VG软件的三维重构功能,研究试件成型方法对水泥稳定碎石混合料内部粗集料取向角和细微观三维空隙结构的影响。结果表明:室内振动压实成型试件的力学强度和疲劳性能与现场路面芯样吻合度最高,振动压实方法能够最大限度模拟水泥稳定碎石混合料施工现场的碾压效果,更适合水泥稳定碎石混合料的配合比设计。集料取向角、平均空隙直径与无侧限抗压强度、劈裂强度及疲劳寿命之间的线性拟合关系良好,不同成型方法对水泥稳定碎石强度的影响机理在于成型方式改变了集料取向角、平均空隙直径等细微观结构性能。 相似文献
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在对《水泥稳定粒料基层施工质量控制标准》进行研究的基础上,介绍了水泥稳定粒料基层底基层施工质量控制要点,深入探讨了其强度指标、压实度指标、平整度指标、厚度指标的测定方法及影响因素,为施工中实测项目的测定方法提供参考,从而保证水泥稳定粒料基层底基层的施工质量。 相似文献
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水泥稳定粒料是现在基层施工中应用较广泛的半刚性基层材料,文章就水泥稳定粒料的性能、施工工序及质量控制作了详细介绍与探讨。 相似文献
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In order to study the influence of organic matter on the mechanical properties of stabilized soil and the effect of XGL2005 on stabilizing organic soil, unconfined compressive strength tests were carried out. Test results indicated that the strength of stabilized soil decreased in the form of a logarithmic function as the organic matter content increased. In contrast, the strength increased in the form of a power function as the content of the stabilization agent increased. The strength of cement stabilized organic soil was reinforced greatly by adding the stabilizer XGL2005. Based on the law obtained from the test, a strength prediction model was established by regression analysis. The model included the influence of the curing time, the content of the cement, the organic matter content and the stabilization agent on the strength of stabilized soil. 相似文献
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Riqing Xu Yin Guo Zengyong Liu 《Frontiers of Architecture and Civil Engineering in China》2008,2(2):161-165
In order to study the influence of organic matter on the mechanical properties of stabilized soil and the effect of XGL2005
on stabilizing organic soil, unconfined compressive strength tests were carried out. Test results indicated that the strength
of stabilized soil decreased in the form of a logarithmic function as the organic matter content increased. In contrast, the
strength increased in the form of a power function as the content of the stabilization agent increased. The strength of cement
stabilized organic soil was reinforced greatly by adding the stabilizer XGL2005. Based on the law obtained from the test,
a strength prediction model was established by regression analysis. The model included the influence of the curing time, the
content of the cement, the organic matter content and the stabilization agent on the strength of stabilized soil.
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Translated from Journal of Zhejiang University (Engineering Science), 2007, 41(1): 109–113 [译自: 浙江 大学学报(工学版)] 相似文献
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用碱渣和石灰石为原料制备了土壤稳定水泥,研究了土壤稳定水泥熟料的煅烧制度,包括生料的配比,熟料的煅烧温度和煅烧时间,熟料的冷却方式以及矿化剂等对稳定土强度的影响。 相似文献
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为了改善青弋江分洪道工程淤泥质土地基的物理力学性能,选用普通硅酸盐水泥、粉煤灰、水玻璃以及木质素磺酸钠组成的水泥基复合固化剂,以青弋江芜湖段典型淤泥质土样作为试验土样,进行了室内固化试验研究,分析了固化剂掺量、淤泥质土初始含水率以及养护龄期的改变对固化土无侧限抗压强度和抗剪强度参数的影响关系。研究结果表明:对于提高青弋江淤泥质土强度,试验所用固化剂作用效果明显,90d龄期养护条件下,掺入复合固化剂处理的固化淤泥质土无侧限抗压强度最高为单掺水泥条件下固化土无侧限抗压强度的4.2倍,同时前者抗剪强度也明显大于后者;固化土无侧限抗压强度随固化剂掺量增加而提高,但增长速率逐渐减缓,同时还随着养护龄期的增加而提高,两者呈明显的对数关系。 相似文献
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《Construction and Building Materials》2007,21(7):1480-1485
In this study a new type of lime–fly ash–phosphogypsum binder was prepared to improve the performances of lime–fly ash binder which was a typical semi-rigid road base material binder in China. The modified lime powder had much higher activity than ordinary quick lime or slaked lime powder, it was the best alkali activator to prepare lime–fly ash–phosphogypsum binder. The optimum formulation of this binder was consisted of 8–12% modified lime, 18–23% phosphogypsum and 65–74% fly ash. The parallel experiments shown that lime–fly ash–phosphogypsum binder had higher strength than ordinary lime, cement, and lime–fly ash stabilized soils road base materials, granular soils stabilized with this binder had higher later strength than that of lime–fly ash or cement stabilizing granular soil, it had higher early strength and steady strength development. The phosphogypsum hastened the pozzuolana reactions between the lime and fly ash, it reacted with lime and fly ash also, this reaction formed some AFt and the formation of AFt brought on a slight expansivity which could compensate the shrinkage of the binder. The pore structure of this binder was finer than that of the lime–fly ash, so the strength and performances of the road base material stabilized with lime–phosphogypsum–fly ash binder was much higher than those of the lime–fly ash road base material. 相似文献