行业资讯
沥青砼施工过程中施工缝的处理
来源：/ 日期：2022-11-16
沥青混凝土路面具有行车舒适、维修方便等特点，因此在高等级公路建设中被广泛使用。从实际施工来看，还有许多问题值得探讨。那么下面来讲讲济南沥青砼施工过程中施工缝的处理事项。
Asphalt concrete pavement is widely used in high-grade highway construction because of its comfortable driving and convenient maintenance. From the perspective of actual construction, there are still many problems worth discussing. Now let's talk about the treatment of construction joints during the asphalt concrete construction in Jinan.
在沥青混凝土路面工程施工的准备阶段，原材料的质量检查应当是质量控制工作的主要内容。在这个阶段应当对选定的沥青、石料、砂、矿粉按照规范要求进行质量检查。
In the preparation stage of asphalt concrete pavement construction, the quality inspection of raw materials should be the main content of quality control. At this stage, the selected asphalt, stone, sand and mineral powder shall be subject to quality inspection according to the specification requirements.
粗集料由各种规格的碎石构成。在工作中，应根据所用混合料的类型确定碎石的规格。碎石应洁净、干燥、表面粗糙，具有足够的强度及耐磨耗性，并应有良好的近正六面体的颗粒形状，与沥青有良好的粘附性。
Coarse aggregate is composed of crushed stone of various specifications. During the work, the specification of crushed stone shall be determined according to the type of mixture used. Crushed stone shall be clean, dry, rough in surface, with sufficient strength and wear resistance, and shall have good particle shape close to regular hexahedron, and have good adhesion with asphalt.
沥青混凝土的细集料宜采用优良的天然砂或机制砂，细集料应与沥青有良好的粘结力，用酸性石料破碎的机制砂或石屑不宜用于高速公路和一级公路的沥青面层，须使用时，应采用有效措施。
Fine aggregate of asphalt concrete should be fine natural sand or machine-made sand. The fine aggregate should have good adhesion with asphalt. The machine-made sand or stone chips crushed with acid stone should not be used for the asphalt surface course of expressways and Class I highways. If necessary, effective measures should be taken.
矿粉须是采用石灰岩或岩浆岩中的强基性岩石等憎性石料经磨细制成的。
The mineral powder shall be made of hydrophobic stone materials such as limestone or strong basic rock in magmatic rock by grinding.
(1)纵向施工缝
(1) Longitudinal construction joint
摊铺采用梯队作业的纵缝采用热接缝。施工时应将先铺的混合料留下10～20cm暂不碾压，作为后摊铺部分的高程基准面。纵缝应在后铺部分摊铺后立即进行碾压，压路机应大部分压在已摊铺碾压好的路面上，仅有10～15cm压在新铺的路面上，然后逐渐移动跨缝碾压以缝迹。
The longitudinal joints for paving in echelon operation shall be hot joints. During construction, 10~20cm of the mixture paved first shall not be rolled temporarily as the elevation datum of the later paved part. The longitudinal joint shall be rolled immediately after the paving of the later part. The roller shall mostly roll on the paved and rolled road surface, and only 10~15cm shall be rolled on the newly paved road surface, and then gradually move the cross joint to roll to eliminate the seam.
半幅施工不能采用热接缝时，宜用切刀将已碾压的前半幅切齐。铺另半幅前须将缝边缘清扫干净，涂刷热粘层沥青。摊铺时应重叠在已铺层上5～10cm，摊铺后用人工将摊铺在前半幅上的混合料铲走。碾压时先在已压实的路面上行驶，碾压新铺层10～15cm，然后逐渐移动跨过纵缝，将纵缝碾压紧密。
When hot joint cannot be used for half width construction, the first half of the rolled part should be cut with a knife. Before paving the other half, the joint edge must be cleaned and the hot tack coat asphalt must be applied. During paving, it shall overlap the paved layer for 5~10cm. After paving, the mixture paved on the first half shall be removed manually. When rolling, first drive on the compacted pavement, roll the newly paved layer for 10-15cm, and then gradually move across the longitudinal joint to compact the longitudinal joint.
(2)横向施工缝
(2) Transverse construction joint
横向施工缝应与路中线垂直。相邻两幅及上下层的横缝应错开1m以上。高速公路和一级公路的上面层应采用平接缝，其中面层、下面层及其它公路的各层均可采用斜接缝。铺筑接缝时，可在已压实的部分上面铺设一些热混合料使之预热软化，以加强新旧混合料的粘结。但在开始碾压前应将预热用的混合料铲除。
The transverse construction joint shall be perpendicular to the road centerline. The transverse joints of two adjacent panels and upper and lower layers shall be staggered for more than 1m. The upper layer of expressway and Class I highway shall adopt flat joint, and the surface layer, lower layer and all layers of other highways can adopt inclined joint. When paving the joints, some hot mixtures can be laid on the compacted part to make it warm and soften, so as to strengthen the bonding of new and old mixtures. However, the mixture for preheating shall be removed before rolling.
This is the end of the problem of construction joint treatment during asphalt concrete construction. The manufacturer reminds you to understand the relevant information in advance, whether purchasing or constructing, so as to achieve higher quality construction. Relevant content comes to us Consult!
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