行業(yè)資訊

下大雨對(duì)路面鋪水泥穩(wěn)定碎石層有影響

來(lái)源：http://m.66975.cn/ 日期：2022-05-23

水泥被沖走，導(dǎo)致水泥含量降低。細(xì)粒被沖走，導(dǎo)致分級(jí)不合理。含水量太高，不能壓實(shí)壓實(shí)。因此，下大雨時(shí)，應(yīng)防止水泥及混合料在雨中淋濕，下雨時(shí)應(yīng)停止施工，并盡快將鋪好的水泥土結(jié)構(gòu)層碾壓壓實(shí)。

The cement is washed away, resulting in a decrease in the cement content. The fine particles are washed away, resulting in unreasonable classification. The moisture content is too high to be compacted. Therefore, in case of heavy rain, the cement and mixture shall be prevented from getting wet in the rain. In case of rain, the construction shall be stopped, and the paved cement soil structure layer shall be rolled and compacted as soon as possible.

水泥穩(wěn)定碎石的壓實(shí)度接近密度，強(qiáng)度主要取決于碎石之間的插鎖原理，同時(shí)有足夠的砂漿體積填充骨料的空隙。其初始強(qiáng)度高，強(qiáng)度隨年齡增長(zhǎng)而迅速形成板狀體，因此具有高強(qiáng)度、良好的抗?jié)B性和抗凍性。

The compactness of cement stabilized macadam is close to the density, and the strength mainly depends on the locking principle between macadam. At the same time, there is enough mortar volume to fill the gap of aggregate. Its initial strength is high, and the strength rapidly forms a plate with the increase of age. Therefore, it has high strength, good impermeability and frost resistance.

水泥穩(wěn)定碎石水泥用量一般為混合料的3%～6%，7天無(wú)側(cè)限抗壓強(qiáng)度可達(dá)5.0Mpa，高于其他路基材料。水泥穩(wěn)定碎石雨后不渾濁，表面堅(jiān)實(shí)，是高級(jí)路面的理想基材。

The cement consumption of cement stabilized macadam is generally 3% ~ 6% of the mixture, and the unconfined compressive strength in 7 days can reach 5.0mpa, which is higher than that of other subgrade materials. Cement stabilized macadam is not muddy after rain and has a solid surface. It is an ideal base material for high-grade pavement.
濟(jì)南水泥穩(wěn)定碎石

作為高等級(jí)公路的主要組成部分，水泥穩(wěn)定碎石層是重要的基礎(chǔ)結(jié)構(gòu)，其作用：

As an important part of highway foundation, the main function of cement stabilized gravel layer is:

水泥穩(wěn)定碎石層是硬質(zhì)路面與土路基的過(guò)渡層。它與路面、路基有效結(jié)合，形成有機(jī)體。

Cement stabilized macadam layer is the transition layer between hard pavement and soil subgrade. It is effectively combined with pavement and subgrade to form an organism.

水泥穩(wěn)定碎石層具有一定的強(qiáng)度和剛度。高于路基，低于路面，既保證了路面一定的厚度來(lái)滿足承載荷載，又降低了施工成本。

The cement stabilized macadam layer has certain strength and stiffness. It is higher than the subgrade and lower than the pavement, which not only ensures a certain thickness of the pavement to meet the bearing load, but also reduces the construction cost.

水泥穩(wěn)定碎石層能將路面上的車輛荷載均勻地分散到路基上，具有一定的韌性。

The cement stabilized macadam layer can evenly disperse the vehicle load on the pavement to the subgrade and has a certain toughness.

水泥穩(wěn)定碎石層中的礫石和粗砂具有良好的濾水作用，可減少路基積水，降低其承載力。

The gravel and coarse sand in the cement stabilized gravel layer have good water filtering effect, which can reduce the ponding of the subgrade and reduce its bearing capacity.

一般情況下，濟(jì)南水泥穩(wěn)定碎石作業(yè)完成24小時(shí)后，方可鋪設(shè)邊石。與砌筑的時(shí)間間隔不宜過(guò)長(zhǎng)，否則混合料成型為板材后，板材會(huì)變硬，增加施工難度，同時(shí)也容易破壞板材的整體性通過(guò)敲擊和鑿開盤子。

Generally, the edge stone can be laid 24 hours after the cement stabilized macadam operation in Jinan is completed. The time interval between and masonry should not be too long, otherwise, after the mixture is formed into plates, the plates will harden, increase the construction difficulty, and easily destroy the integrity of the plates by knocking and chiseling the plates.

維護(hù)時(shí)間不少于7天。在此期間，禁止車輛通行。灑水器每天灑水2至4次，以保持其濕潤(rùn)。

The maintenance time shall not be less than 7 days. During this period, vehicles are prohibited. Sprinklers spray water 2 to 4 times a day to keep it moist.

碎石由反擊式破碎機(jī)、反擊式破碎機(jī)或圓錐破碎機(jī)生產(chǎn)。禁止使用鱷魚破碎機(jī)進(jìn)行二次破碎。生產(chǎn)線必須安裝除塵設(shè)備。碎石加工廠中振動(dòng)篩的規(guī)格有：6mm、11mm、22mm、41mm。碎石技術(shù)指標(biāo)要求密度大于2.6t/m3，破碎值（%）小于25%。

Crushed stone is produced by impact crusher, impact crusher or cone crusher. It is forbidden to use crocodile crusher for secondary crushing. Dust removal equipment must be installed on the production line. The specifications of vibrating screen in gravel processing plant are 6mm, 11mm, 22mm and 41mm. The technical index of crushed stone requires that the density is greater than 2.6t/m3 and the crushing value (%) is less than 25%.

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