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沥青混合料冷再生效果特点

来源:https://www.sddhfjx.com/ 日期:2021-12-07
包含土的成分和品种的影响和沥青混合料的组成结构类型的影响。混合料按照颗粒尺度分布状况的不同,能够分为三种物理状况:悬浮一密实结构、骨架一空地结构、密实一骨架结构:
It includes the influence of soil composition and variety and the influence of asphalt mixture composition and structure type. According to different particle size distribution, the mixture can be divided into three physical conditions: suspension dense structure, skeleton open space structure and dense skeleton structure:
水泥的矿物成分和分散度对水泥安稳土的安稳效果有显着影响。
The mineral composition and dispersion of cement have a significant impact on the stability effect of cement stabilized soil.
沥青品种和用量对混合料的性质影响尤为重要,过少的沥青用量会使混合料达不到相关的指定规范,过多的用量会使混合料不仅达不到相关规范,还形成糟蹋,也不经济,路面改进效果也不是很显着。
Asphalt variety and dosage have a particularly important impact on the properties of the mixture. Too little asphalt dosage will make the mixture fail to meet the relevant specified specifications. Too much asphalt dosage will not only make the mixture fail to meet the relevant specifications, but also form waste and uneconomical. The effect of pavement improvement is not very significant.
含水量对掺加水泥的沥青混合料有很大的影响,当含水量不足时,水泥不能在混合猜中完全水化和水解,发挥不了水泥对混合料的安稳作用,影响强度的形成,含水量偏大会有水分流出,水泥的有效成分随水流走,导致抗压强度下降;含水量过大还会形成掺加水泥的沥青混合料的干缩问题。
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The water content has a great impact on the asphalt mixture mixed with cement. When the water content is insufficient, the cement cannot be fully hydrated and hydrolyzed in the mixing process, which can not play the role of cement in the stability of the mixture and affect the formation of strength. The water content tends to flow out, and the effective components of cement go with the water flow, resulting in the decrease of compressive strength; Excessive water content will also form the problem of dry shrinkage of asphalt mixture mixed with cement.
掺加水泥的沥青混合料的强度是在一系列杂乱的物理、化学反应过程中逐步形成的,而这些反应过程需要必定的外界条件。试验证明,必定的温度和必定的湿度对掺加水泥的混合料的强度的形成是有利的。
The strength of asphalt mixture with cement is gradually formed in a series of chaotic physical and chemical reactions, which require certain external conditions. The test shows that a certain temperature and humidity are beneficial to the formation of the strength of the mixture mixed with cement.
一般的水泥安稳土对集料压碎值有必定的要求。用水泥和乳化沥青再生旧沥青路面材料时,对集料的压碎值相同也有必定的要求。
General cement stabilized soil has certain requirements for aggregate crushing value. When recycling old asphalt pavement materials with cement and emulsified asphalt, there are certain requirements for the same crushing value of aggregate.
沥青混凝土旧路现场冷再生底层(底底层、面层)成本费主要为机械费用和添加剂费用,人工费与其他底层的施工根本相同。现场冷再生工艺与其他半刚性底层资料相比,节省了以下费用:旧路面铣刨及外运费用、底层(底底层、面层)的原资料费用、原资料的运输费用、缩短施工周期的费用等。
The cost of cold recycled bottom layer (bottom layer and surface layer) of old asphalt concrete road is mainly machinery cost and additive cost, and the labor cost is basically the same as that of other bottom layers. Compared with other semi-rigid bottom layer materials, the on-site cold regeneration process saves the following costs: milling and outward transportation costs of old pavement, raw material costs of bottom layer (bottom layer, surface layer), transportation costs of raw materials, costs of shortening construction cycle, etc.
再生沥青混合料除了具有一定的经济效益外,还间接的具有良好的社会效益和环境效益,而这些效益是无法用钱银来衡量的。
Recycled asphalt mixture not only has certain economic benefits, but also indirectly has good social and environmental benefits, which can not be measured by money and silver.
因为铺筑再生路面而充分利用了旧沥青混合料,解决了沥青路面翻修所发生很多废料对环境污染问题,保护了人类生存的环境,契合了我国的可持续发展战略中废物资源化的要求;因为节省沥青和砂石材料,削减了对材料的需求量,又有助于自然资源的保护,平缓沥青材料供求的紧张状态;因为节省了投资,下降了工程造价,使某些本来不能及时翻修的旧沥青路面得以修复,从而改善了道路情况,提高了公路的运输能力,削减轮胎的磨损,下降运输成本,削减可能发生的交通事故,确保行车舒适安全。
The old asphalt mixture is fully utilized because of the paving of recycled pavement, which solves the problem of environmental pollution caused by many wastes in the renovation of asphalt pavement, protects the human living environment, and meets the requirements of waste recycling in China's sustainable development strategy; Because saving asphalt and gravel materials reduces the demand for materials, helps to protect natural resources and ease the tension between supply and demand of asphalt materials; Because the investment is saved and the project cost is reduced, some old asphalt pavements that could not be renovated in time can be repaired, so as to improve the road conditions, improve the highway transportation capacity, reduce tire wear, reduce transportation costs, reduce possible traffic accidents and ensure driving comfort and safety.
本文主要介绍了沥青路面老化机理、沥青路面冷再生技能的根本原理,影响因素、经济及环境效益等。经过对沥青混合料冷再生根本技能的介绍,我能可以较为全面的了解这项技能的根本特点和使用优势。
This paper mainly introduces the aging mechanism of asphalt pavement, the fundamental principle of asphalt pavement cold regeneration technology, influencing factors, economic and environmental benefits, etc. After introducing the basic skills of cold recycling of asphalt mixture, I can comprehensively understand the basic characteristics and application advantages of this skill.
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