SHEAR STRENGTH OF UNTREATED ROAD BASE AGGREGATES MEASURED BY VARIABLE LATERAL PRESSURE TRIAXIAL CELL
SHEAR STRENGTH OF UNTREATED ROAD BASE AGGREGATES MEASURED BY VARIABLE LATERAL PRESSURE TRIAXIAL CELL
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发表时间：
1972-06
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影响因子：
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通讯作者：
C. S. Dunn;P. K. Bora
中科院分区：
文献类型：
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作者：
C. S. Dunn;P. K. Bora
介绍了一种评价无粘结路面基层集料抗剪强度的变侧压室内三轴试验方法。当只测试一个材料试件时，可以确定相对于有效应力的剪切阻力角。描述了利用可变侧压装置研究集料的物理性质对其抗剪强度的影响的试验。对于Fuller级配骨料，剪切阻力角随最大颗粒尺寸的增大而显著增大。材料中夹杂的片状颗粒不会对剪切强度造成不利影响，实际上会略微增加剪切强度。只含10%的骨料通过36B.S.筛的剪切阻力角随这一组分的塑性增加而降低。比较了四种不同骨料基层的永久变形，发现抗剪角度最大的材料所受的变形最小。/作者/
A VARIABLE LATERAL PRESSURE LABORATORY TRIAXIAL TEST FOR EVALUATING THE SHEAR STRENGTH OF UNBOUND ROAD BASE AGGREGATES IS DESCRIBED. WHEN ONLY ONE SPECIMEN OF MATERIAL IS TESTED, THE ANGLE OF SHEARING RESISTANCE MAY BE DETERMINED WITH RESPECT TO EFFECTIVE STRESS. TESTS USING THE VARIABLE LATERAL PRESSURE APPARATUS TO INVESTIGATE THE EFFECTS OF THE PHYSICAL PROPERTIES OF AGGREGATES ON THEIR SHEAR STRENGTH ARE DESCRIBED. FOR FULLER GRADED AGGREGATES, THE ANGLE OF SHEARING RESISTANCE IS APPRECIABLY INCREASED AS THE SIZE OF THE LARGEST PARTICLE IS INCREASED. THE INCLUSION OF FLAKY PARTICLES IN THE MATERIAL IS NOT DETRIMENTAL TO SHEAR STRENGTH AND IN FACT TENDS TO INCREASE IT SLIGHTLY. THE ANGLE OF SHEARING RESISTANCE OF AN AGGREGATE CONTAINING ONLY 10 PERCENT PASSING THE NO. 36 B.S. SIEVE IS SHOWN TO FALL WHEN THE PLASTICITY OF THIS FRACTION IS INCREASED. COMPARISON OF THE OBSERVED PERMANENT DEFORMATIONS SUFFERED BY FOUR DIFFERENT AGGREGATE BASES SHOWS THAT MATERIALS HAVING THE HIGHEST ANGLE OF SHEARING RESISTANCE SUFFER THE LEAST DEFORMATION. /AUTHOR/