压碎指标

通过进一步的分析，揭示了混凝土抗压强度与灰水比和骨料压碎指标之间良好线性相关性，并建立起天然与再生骨料混凝土的Bolomey统一公式。

Through further analysis , it is found that a good linear correlation between the compressive strength of concrete and the cement-to-water ratio and the crushing value of aggregate exists and a unified Bolomey 's formula is established for concrete made with both natural and recycled aggregate .

试验结果表明，混凝土抗压强度不仅与水灰比密切相关，而且与骨料压碎指标有关。

Experimental results show that the compressive strength of concrete is closely related not only to the water-to-cement ratio , but also to the crushing value of aggregate .

压碎指标与集料强度和级配有关；

The compressive standard is related to aggregate strength and its grading .

首先，在室内对再生混凝土集料的级配、密度和压碎指标等基本性能进行了较为系统地测试；

Firstly , in-door tests of basic performances of RCA are conducted , including the grade , density and crush index , etc.

本文较全面的研究了天然粗骨料和再生粗骨料各种物理性能，包括颗粒级配、表观密度、空隙率、吸水率、压碎指标等。

The paper generally examines the physical properties of the recycled coarse aggregate , compares them with that of the natural coarse aggregate .

本文研究了粗集料的最大粒径、级配和压碎指标值等对路面混凝土抗折强度的影响。

The effect of maximum diameter , grading distribution and crushing index of coarse aggregate on flexural strength of concrete is investigated through experiments .

其针片状物质含量较高且压碎指标较大，在一定程度上影响了混凝土的力学性能。

Bottom ash contains needle and flake material , and its crushed index is higher , it effects the mechanical properties of concrete in a certain extent .

分析了骨料的压碎指标与基本性能受高温作用的影响规律，为配制再生混凝土提供必要依据。

On the other hand , this paper analyzes the rules that crushing index and basic performance of the aggregate are affected by high-temperature , and it offeres the essential basis for compounding the recycled concrete .

试验结果表明，混凝土强度随作用温度的升高而下降，破碎后骨料的吸水率和压碎指标受内部缺陷、作用温度和粒径大小的影响较为显著。

The test shows : the concrete strength reduces with heated temperature increases , the specific water absorption and crushing index of broken aggregate are remarkably influenced by its inside defects , heated temperature and grain size .

再生骨料与天然骨料相比，堆积密度小、吸水率高、表面粗糙且压碎指标大，对再生混凝土性能影响明显。

Compared with natural aggregate , the accumulation density of recycled aggregate is lower , the water absorption is higher , the surface is rougher and the crush index is greater , the performance of concrete changes evidently .

结果表明，混凝土强度不仅与水灰比密切相关，且与混凝土所用粗骨料强度（压碎指标）密切相关。

The results show that compressive strength of concrete is not only clearly linearly related to cement water ratio or net cement water ratio , but also clearly related to crush index of natural and recycled concrete coarse aggregate .

和天然粗骨料相比，再生粗骨料组成成份复杂，且具有密度小、空隙率大、吸水快、吸水率大、压碎指标值大、含泥量大及坚固性低等特点。

Compared to the natural coarse aggregate , the composition of recycled coarse aggregate is complex , and it is of lower density , higher porosity , faster water absorption , larger water absorption capacity , larger crushing index value , larger quantity of mud and lower robustness .