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水穩(wěn)砼基層表層的不同配比試件如何？

來(lái)源：http://ywsun168.com/ 日期：2022-12-30

水穩(wěn)料采用水泥、粉煤灰、穩(wěn)定碎石、砂、石屑等筑路材料作為水泥穩(wěn)定碎石基層。下面來(lái)講講濟(jì)南水穩(wěn)砼基層表層的不同配比試件如何。

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.

實(shí)驗(yàn)室通過(guò)經(jīng)過(guò)一定數(shù)量的原材料試驗(yàn)，進(jìn)行配合比設(shè)計(jì)、擊實(shí)實(shí)驗(yàn)，確定大干密度和佳含水量。然后以此配比制成試件，試件在規(guī)定溫度條件下保濕養(yǎng)護(hù)6天，浸水1天后，進(jìn)行無(wú)側(cè)限抗壓強(qiáng)度實(shí)驗(yàn)。

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）經(jīng)過(guò)對(duì)集料為砂、碎石、水泥和集料為粉煤灰、碎石、水泥的兩種配比試驗(yàn)，結(jié)果發(fā)現(xiàn)摻加粉煤灰的水泥穩(wěn)定混合料不僅其和易性較好，而且試塊容易成型，成型后的試塊外觀較好，7天平均強(qiáng)度也較高。

(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.
濟(jì)南水穩(wěn)砼

（2）不同配比灰土試件，7天無(wú)側(cè)限抗壓強(qiáng)度在1.0mpa左右；而不同配比水穩(wěn)試件7天無(wú)側(cè)限抗壓強(qiáng)度在4～7mpa之間（采用325號(hào)普通水泥，水泥摻量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）不同配比灰土試件經(jīng)幾次凍融循環(huán)后，抗壓強(qiáng)度幾乎沒有；而摻有水泥和粉煤灰的不同配比的水穩(wěn)試件，經(jīng)10次凍融循環(huán)后，仍可測(cè)得一定的強(qiáng)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.

通過(guò)觀測(cè)、分析不同配比的灰土基層板體性較差，干縮、溫縮系數(shù)大，這樣的基層表層受水浸泡后強(qiáng)度降低，在行車荷載反復(fù)作用下，容易被面層材料啃噬成粉末狀，易被滲進(jìn)的水混合成泥漿流走，逐漸使面層脫空，造成油面沉陷、龜裂、脫落，這就是瀝青路面病害產(chǎn)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、石屑等組成的水穩(wěn)基層，具有強(qiáng)度高、面層薄、板體性、水穩(wěn)定性、抗凍性好等特性，正好彌補(bǔ)了灰土基層的缺陷，從而大大提高瀝青混凝土道路的使用壽命。更多相關(guān)事項(xiàng)的了解就來(lái)咨詢我們http://ywsun168.com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 http://ywsun168.com Come on!

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