THE EFFECT OF GRADING AND DENSITY ON THE MECHANICAL PROPERTIES OF A CRUSHED DOLOMITIC LIMESTONE --14TH ARRB CONFERENCE, 28 AUGUST - 2 SEPTEMBER, 1988, CANBERRA, ACT, AUSTRALIA; PROC. PARTS 1 - 8
THE EFFECT OF GRADING AND DENSITY ON THE MECHANICAL PROPERTIES OF A CRUSHED DOLOMITIC LIMESTONE --14TH ARRB CONFERENCE, 28 AUGUST - 2 SEPTEMBER, 1988, CANBERRA, ACT, AUSTRALIA; PROC. PARTS 1 - 8
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发表时间：
1988
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通讯作者：
N. Thom;S. Brown
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作者：
N. Thom;S. Brown
本文描述了对不同级配的干燥、破碎、白云质石灰石样品进行的实验室测试，以确定用于路面设计和涉及分析方法的评估计算所需的特性。试验采用伺服液压控制重复负载三轴试验装置。研究了七个等级，从单一尺寸到非常广泛的等级，但都具有相同的最大颗粒尺寸 10 毫米。为了研究密度对力学性能的影响，在每个等级使用不同的压实力度制作了三个样本。结果表明，弹性刚度对密度和级配相对不敏感，以及密度对循环载荷下的剪切强度和塑性应变抵抗力的主要影响。根据这些测试以及水分存在的影响（包括吸力和可能的正孔隙压力），比较了均匀和广泛分级材料的相对优点（a）。有关会议的报道记录，请参阅 IRRD 编号 808936。
This paper describes laboratory tests on specimens of dry, crushed, dolomitic limestone of different gradings carried out in order to determine the characteristics necessary for use in pavement design and evaluation computations involving analytical methods. A servo hydraulically controlled repeated load triaxial test facility was used for the tests. Seven gradings were investigated, ranging from single sized to very broadly graded, but all with the same maximum particle size of 10 mm. Three specimens were made at each grading, using difference compactive efforts, in order to investigate the influence of density on the mechanical properties. Results are presented which show the comparative insensitivity of elastic stiffness to both density and grading and the dominant influence of density on shear strength and resistance to plastic straining under cyclic load. The relative merits of uniform and broadly graded materials are compared in the light of these tests and also with respect to effects from the presence of moisture, including both suction and possible positive pore pressures (a). For the covering record of the conference, see IRRD no 808936.