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水泥穩(wěn)定級(jí)配碎石基層的施工

來(lái)源:http://guixin.net.cn/ 日期:2023-10-13
水泥穩(wěn)定碎石混合料組成設(shè)計(jì):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。,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),確定比較大干密度和比較好含水量。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)。如水泥4%、粉煤灰10%、級(jí)配碎石86%的重型擊實(shí)試驗(yàn)告。粗集料(1)碎石采用反擊式、沖擊破或圓錐式破碎機(jī)生產(chǎn),二次破碎禁止采用鱷式破碎機(jī)生產(chǎn),生產(chǎn)線必須安裝除塵設(shè)備進(jìn)行除塵。碎石加工廠振動(dòng)篩網(wǎng)規(guī)格:6mm、11mm、22mm、41mm。(2)碎石技術(shù)指標(biāo)要求,密度大于2.6t/m3,壓碎值(%)小于25%。水泥穩(wěn)定碎石可以作為路面的基層。
Composition design of cement stabilized crushed stone mixture: Cement, fly ash, stabilized crushed stone, sand, stone chips and other road building materials are used as the cement stabilized crushed stone base. Firstly, the laboratory conducts mix design and compaction experiments through a certain number of raw material tests to determine a relatively high dry density and good moisture content. Then, a test piece is made with this ratio, and the test piece is moisturized and cured for 6 days under the specified temperature conditions. After soaking in water for 1 day, an unconfined compressive strength test is conducted. Heavy compaction test reports such as cement 4%, fly ash 10%, and graded crushed stone 86%. Coarse aggregate (1) crushed stone is produced using impact, impact or cone crushers, and secondary crushing is prohibited using crocodile crushers. The production line must be equipped with dust removal equipment for dust removal. Specification of vibrating screen mesh for crushed stone processing plant: 6mm, 11mm, 22mm, 41mm. (2) The technical indicators of crushed stone require a density greater than 2.6t/m3 and a crushing value (%) less than 25%. Cement stabilized crushed stone can serve as the base layer of the road surface.
濟(jì)南水泥穩(wěn)定碎石
混合料的拌和(1)拌和機(jī)械的選擇:必須選用有電子計(jì)量的拌和設(shè)備,來(lái)保證混合料的級(jí)配精度。一般采用產(chǎn)量大于400t/h的拌和機(jī),以保證實(shí)際產(chǎn)量能滿足攤鋪能力,避免“等料”現(xiàn)象,縮短延遲時(shí)間。
Mixing of mixture (1) Selection of mixing machinery: Electronic metering mixing equipment must be selected to ensure the grading accuracy of the mixture. Generally, a mixer with a production capacity greater than 400t/h is used to ensure that the actual production can meet the paving capacity, avoid the phenomenon of "waiting for materials", and shorten the delay time.
(2)水穩(wěn)混合料中的含水量對(duì)水穩(wěn)碎石的強(qiáng)度及裂縫的產(chǎn)生有很大的影響。每天拌和前試驗(yàn)人員應(yīng)檢查碎石的級(jí)配、材料的含水量等,并認(rèn)真填寫(xiě)和下達(dá)生產(chǎn)配合比通知單,生產(chǎn)過(guò)程中,要根據(jù)天氣、氣溫、早中晚等具提因素適時(shí)調(diào)整加水量。
(2) The water content in the water stabilized mixture has a significant impact on the strength and cracking of the water stabilized crushed stone. Before mixing every day, the testing personnel should check the gradation of the crushed stone and the moisture content of the material, and carefully fill out and issue a production mix proportion notice. During the production process, the water content should be adjusted in a timely manner based on specific factors such as weather, temperature, morning, noon, and evening.
(3)水泥、集料拌和得愈均勻,水穩(wěn)碎石的強(qiáng)度和穩(wěn)定性愈高。拌和不均勻會(huì)使水泥劑量少的地方強(qiáng)度不足,而水泥劑量多的地方則裂縫增加。因此,在拌和過(guò)程中必須專設(shè)工程技術(shù)人員對(duì)拌和全過(guò)程進(jìn)行檢查、巡視和旁站,確?;旌狭系暮俊⑺鄤┝?、級(jí)配等能滿足要求,以及觀察混合料的顏色及水泥、石料的下料情況,保證拌和的順利和成功。
(3) The more evenly mixed the cement and aggregates, the higher the strength and stability of the water stabilized crushed stone. Uneven mixing will result in insufficient strength in areas with low cement dosage, while cracks will increase in areas with high cement dosage. Therefore, during the mixing process, specialized engineering and technical personnel must be assigned to inspect, patrol, and supervise the entire mixing process to ensure that the water content, cement dosage, grading, etc. of the mixture meet the requirements, as well as to observe the color of the mixture and the cutting of cement and stone materials, to ensure the smooth and successful mixing.
本文由濟(jì)南水泥穩(wěn)定碎石友情奉獻(xiàn).更多有關(guān)的知識(shí)點(diǎn)擊:http://guixin.net.cn我們將用真誠(chéng)的態(tài)度.為您提供為的服務(wù).更多有關(guān)的知識(shí)我們將會(huì)陸續(xù)向大家奉獻(xiàn).敬請(qǐng)期待.
This article is dedicated by Jinan Cement Stabilized Crushed Stone Friendship. For more relevant knowledge, click on: http://guixin.net.cn We will provide you with comprehensive services with a sincere attitude. We will gradually contribute more relevant knowledge to everyone. Stay tuned
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