本文選題：煤矸石粉　切入點(diǎn)：HMA　出處：《中外公路》2017年05期

【摘要】：由于自然資源日益枯竭,各行各業(yè)對(duì)于廢物利用的需求顯著增長(zhǎng)。煤矸石是在煤的開采、加工過程中產(chǎn)生的副產(chǎn)品,其在自然環(huán)境中的累積引起了一系列經(jīng)濟(jì)和環(huán)境問題。為了研究煤矸石粉在道路工程中的適用性,通過馬歇爾穩(wěn)定度、間接拉伸強(qiáng)度、水穩(wěn)定性、回彈模量和耐疲勞性能試驗(yàn),對(duì)煤矸石粉熱拌瀝青混凝土與石灰石粉、沸石粉和普通硅酸鹽水泥等傳統(tǒng)填料熱拌瀝青混凝土進(jìn)行力學(xué)性能對(duì)比。結(jié)果表明:與石灰石粉和沸石粉相比,煤矸石粉尤其是煤矸石灰作為填料改善了熱拌瀝青混凝土的力學(xué)性能,而煤矸石灰瀝青混凝土和普通硅酸鹽水泥瀝青混凝土有幾乎相同的力學(xué)性能。另外,采用毒性特征浸出程序(TCLP)來評(píng)價(jià)煤矸石粉瀝青混凝土對(duì)環(huán)境的影響,結(jié)果表明:不同試驗(yàn)樣品的重金屬濃度在很大程度上小于標(biāo)準(zhǔn)值。因此將煤矸石粉作為填料應(yīng)用在熱拌瀝青混凝土中不僅可以獲得優(yōu)良的力學(xué)性能,而且還可以有效減少煤矸石對(duì)環(huán)境的污染。
[Abstract]:Because of the natural resources, the needs of all walks of life for the utilization of waste coal gangue is increased significantly. In coal mining, a by-product produced in the processing process, the accumulation in the natural environment caused a series of economic and environmental issues. In order to study the applicability of coal gangue in road engineering, by Marshall stability, indirect tensile strength, water stability, modulus of resilience and resistance to fatigue test of coal gangue powder hot mix asphalt concrete and limestone powder, compared the mechanical properties of zeolite powder and ordinary portland cement and other traditional packing hot mix asphalt concrete. The results showed that: compared with lime powder and zeolite powder, coal gangue powder especially coal gangue lime as filler to improve the mechanical properties of hot mix asphalt concrete, coal gangue and asphalt concrete and Portland cement asphalt concrete have almost the same mechanical properties. In addition, the toxicity characteristic leaching procedure (TCLP) results show that to evaluate the impact of coal gangue asphalt concrete on the environment: the concentration of heavy metals in different samples are largely less than the standard value. So the coal gangue powder as filler used in hot mix asphalt concrete can not only obtain excellent mechanical properties, but also can effectively reduce the environmental pollution of coal gangue.

【作者單位】： 長(zhǎng)沙理工大學(xué)交通運(yùn)輸工程學(xué)院;
【基金】：湖南省(長(zhǎng)沙理工大學(xué))研究生科研創(chuàng)新項(xiàng)目(編號(hào):CX2017B469)
【分類號(hào)】：U414
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本文編號(hào)：1669586