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泡沫沥青就地冷再生技术特点

来源:https://www.sddhfjx.com/ 日期:2022-01-14
泡沫沥青又叫膨胀沥青,是将一定的常温冷水注入热沥青,使其发生膨胀,形成大量的沥青泡沫,经过很短的时间,沥青泡沫破裂。
Foamed asphalt, also called expanded asphalt, is a cold water injected into the hot asphalt at certain normal temperature, causing it to expand and form a large amount of asphalt foam. After a short period of time, the asphalt foam burst.
当泡沫沥青与集料接触时,沥青泡沫间化为数以万计的“小颗粒”,散布于细集料的表面,形成黏有大量沥青的细料填缝料,经过拌合压实,这些细料能填充于粗料之间的空隙,并形成类似砂浆的作用,使混合料达到稳定。
When the foamed asphalt is in contact with aggregate, the asphalt foam is interchanged into tens of thousands of "small particles", dispersed on the surface of the fine aggregate, forming a fine material filling material with a large amount of asphalt. After mixing and compacting, these fine materials can fill the gap between coarse materials and form a mortar like function to make the mixture stable.
废弃的路面铣刨材料在铣刨现场重新再生利用可作为泡沫沥青冷再生混合料集料,并在压实力的作用下形成具有一定路用性能的路面结构层。变废为宝,从而达到保护环境、节约资源的作用;同时利用泡沫沥青冷再生技术可以将传统的半刚性路面结构改造成半柔性基层路面结构,从而优化路面组合形式,延长路面使用寿命.
冷再生机出租
The waste road milling material can be used as a recycling material for foamed asphalt cold recycling mixture, and it will form a pavement structure layer with certain pavement performance under the pressure strength. Turn waste into treasure, so as to protect the environment and save resources; At the same time, the cold recycling technology of foamed asphalt can transform the traditional semi-rigid pavement structure into semi flexible base pavement structure, so as to optimize the pavement combination form and prolong the service life of pavement.
目前主要采用膨胀率和半衰期两个指标对沥青发泡特性进行评价。膨胀率是指沥青发泡膨胀时达到的最大体积与泡沫完全消失时的体积之比,反映泡沫沥青的黏度大小。半衰期是指泡沫沥青从最大体积降到最大体积的一半需要的时间,以 s 计,反映泡沫沥青的稳定性。
At present, the expansion rate and half-life are mainly used to evaluate the foaming characteristics of asphalt. The rate of expansion refers to the ratio between the maximum volume of asphalt expansion and the volume when the foam completely disappears, which reflects the viscosity of the foamed asphalt. The half-life is the time required to reduce the volume of foam asphalt from the maximum volume to the maximum volume. It reflects the stability of foamed asphalt in the form of S.
为了使发泡沥青与常温湿集料拌合充分,膨胀率越大越好,半衰期则越长越好,以便发泡沥青与集料有较长时间进行拌和,提高发泡沥青混合料的质量。评价沥青发泡效果时,膨胀率和半衰期是两个密不可分的指标,最好的发泡效果应使两个值均比较大,而不能单独采用一个指标来控制。建议发泡沥青的膨胀率≥10 倍,半衰期≥8s。
In order to fully mix foamed asphalt and normal temperature wet aggregate, the greater the expansion rate, the better, and the longer the half-life, so that foamed asphalt and aggregate can be mixed for a long time to improve the quality of foamed asphalt mixture. When evaluating the foaming effect of asphalt, the expansion rate and half-life are two inseparable indexes. The best foaming effect should make both values relatively large, but can not be controlled by one index alone. It is recommended that the expansion rate of foamed asphalt ≥ 10 times and the half-life ≥ 8s.
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