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水稳砼基层表层的不同配比试件如何？
来源：/ 日期：2022-12-30
水稳料采用水泥、粉煤灰、稳定碎石、砂、石屑等筑路材料作为水泥稳定碎石基层。下面来讲讲济南水稳砼基层表层的不同配比试件如何。
Cement, fly ash, stabilized macadam, sand, stone chips and other road building materials are used as cement stabilized macadam base. Now let's talk about how to use different proportion test pieces for Jinan water stabilized concrete base course surface.
实验室通过经过一定数量的原材料试验，进行配合比设计、击实实验，确定大干密度和佳含水量。然后以此配比制成试件，试件在规定温度条件下保湿养护6天，浸水1天后，进行无侧限抗压强度实验。
Through a certain number of raw material tests, the laboratory carries out mix design and compaction experiments to determine the high dry density and good water content. Then the test piece is made with this ratio. The test piece is kept wet and cured for 6 days at the specified temperature. After being immersed in water for 1 day, the unconfined compressive strength test is carried out.
（1）经过对集料为砂、碎石、水泥和集料为粉煤灰、碎石、水泥的两种配比试验，结果发现掺加粉煤灰的水泥稳定混合料不仅其和易性较好，而且试块容易成型，成型后的试块外观较好，7天平均强度也较高。
(1) Through two kinds of proportioning tests on aggregate consisting of sand, crushed stone, cement and aggregate consisting of fly ash, crushed stone and cement, it is found that the cement stabilized mixture mixed with fly ash not only has good workability, but also is easy to form the test block. The formed test block has a good appearance and a high 7-day average strength.
（2）不同配比灰土试件，7天无侧限抗压强度在1.0mpa左右；而不同配比水稳试件7天无侧限抗压强度在4～7mpa之间（采用325号普通水泥，水泥掺量5%～6%）。
(2) The unconfined compressive strength of lime soil specimens with different proportions in 7 days is about 1.0 mpa; However, the 7-day unconfined compressive strength of water stabilized specimens with different proportions is between 4 and 7 mpa (No. 325 ordinary cement is used, and the cement content is 5% to 6%).
（3）不同配比灰土试件经几次冻融循环后，抗压强度几乎没有；而掺有水泥和粉煤灰的不同配比的水稳试件，经10次冻融循环后，仍可测得一定的强度。
(3) After several freeze-thaw cycles, the compressive strength of lime soil specimens with different proportions is almost zero; However, after 10 freeze-thaw cycles, the strength of water stabilized specimens with different proportions of cement and fly ash can still be measured.
通过观测、分析不同配比的灰土基层板体性较差，干缩、温缩系数大，这样的基层表层受水浸泡后强度降低，在行车荷载反复作用下，容易被面层材料啃噬成粉末状，易被渗进的水混合成泥浆流走，逐渐使面层脱空，造成油面沉陷、龟裂、脱落，这就是沥青路面病害产生的主要原因。
Through observation and analysis, the lime soil base course with different proportions has poor slab properties, large dry shrinkage and temperature shrinkage coefficients, and the strength of such base course surface is reduced after being soaked in water. Under the repeated action of driving load, it is easy to be chewed into powder by surface materials, and it is easy to be mixed into slurry to flow away, gradually making the surface void, causing oil surface subsidence, cracking and falling off, which is the main cause of asphalt pavement diseases.
由水泥、粉煤灰、碎石、砂、石屑等组成的水稳基层，具有强度高、面层薄、板体性、水稳定性、抗冻性好等特性，正好弥补了灰土基层的缺陷，从而大大提高沥青混凝土道路的使用寿命。更多相关事项的了解就来咨询我们吧！
The water stabilized base composed of cement, fly ash, crushed stone, sand, stone chips, etc. has the characteristics of high strength, thin surface layer, good slab property, water stability, frost resistance, etc., which just makes up the defects of lime soil base, thus greatly improving the service life of asphalt concrete roads. Please consult us for more information on relevant matters Come on!
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