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水穩(wěn)的材料組成要注意什么?
水穩(wěn)是水穩(wěn)層的簡(jiǎn)稱,全稱為水泥穩(wěn)定碎石層。水穩(wěn)層是用水泥固結(jié)劑配比碎石頭,通過(guò)壓力使路面基層更結(jié)實(shí)。作為高等級(jí)路面的主要組成部分之一,水穩(wěn)層能與路基結(jié)合,具有一定硬度,可保證公路結(jié)實(shí)度的同時(shí)節(jié)約建筑用料。水穩(wěn)層需與面層良好結(jié)合,才能有足夠的平坦度和結(jié)實(shí)度,以及較好的抗水能力、穩(wěn)定性及硬度。
Water stable layer is the abbreviation of water stable layer, and its full name is cement stabilized crushed stone layer. The water stable layer is a mixture of cement consolidation agent and crushed stones, which makes the pavement base more solid through pressure. As one of the main components of high-grade pavement, the water stable layer can effectively combine with the roadbed, has a certain hardness, and can ensure the firmness of the highway while saving construction materials. The water stable layer needs to be well combined with the surface layer to have sufficient flatness and firmness, as well as good water resistance, stability, and hardness.
水穩(wěn)材料主要由粒料和灰漿體積組成。粒料為級(jí)配碎石,灰漿體積包括水和膠凝材料,膠凝材料由水泥和混合材料組成。水泥作為集合料的一種穩(wěn)定劑,其質(zhì)量對(duì)集料的質(zhì)量是關(guān)重要的,施工時(shí)選用終凝時(shí)間較長(zhǎng),標(biāo)號(hào)較低的水泥。為使穩(wěn)定土有足夠的時(shí)間進(jìn)行拌和、運(yùn)輸、攤鋪、碾壓以及保證其具有足夠的強(qiáng)度,不應(yīng)使用快凝水泥、早強(qiáng)水泥以及受潮變質(zhì)水泥。
Water stable materials are mainly composed of granular materials and mortar volume. The granular material is graded crushed stone, and the mortar volume includes water and cementitious materials. The cementitious materials are composed of cement and mixed materials. Cement, as a stabilizer of aggregates, its quality is crucial to the quality of aggregates. Cement with a longer final setting time and lower grade should be selected during construction. In order to provide sufficient time for mixing, transportation, paving, rolling and ensuring sufficient strength of the stabilized soil, fast setting cement, early strength cement, and damp deteriorated cement should not be used.
混合材料分活性和非活性兩大類。活性材料是指粉煤灰等物質(zhì),可與水泥中析出的氧化鈣作用。非活性材料是指不具有活性或活性甚低的人工或天然的礦物材料,對(duì)這類材料的品質(zhì)要求是材料的細(xì)度和不含有害的成分。
Mixed materials are divided into two categories: active and inactive. Active materials refer to substances such as fly ash that can react with the precipitated calcium oxide in cement. Non active materials refer to artificial or natural mineral materials that are not active or have very low activity. The quality requirements for such materials are the fineness of the material and the absence of harmful components.
應(yīng)用人工集配碎石,道路工程用做底基層時(shí)集料的粒徑不應(yīng)超過(guò)40mm,用做基層時(shí),集料的粒徑不應(yīng)超過(guò)30mm。
The maximum particle size of the aggregate used for the sub base layer in road engineering should not exceed 40mm, and the maximum particle size of the aggregate used for the base layer should not exceed 30mm.
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