简述水泥混凝土路面病害处理方法

1、简述水泥混凝土路面病害处理方法Stiffness of cement concrete pavement is a big , strong diffusion capacity , good stability pavement structure . With the growth of the construction of mileage accumulated practical experience , in-depth scientific research , cement concrete road construction technology gradually impr

2、oved quality continues to improve . Coupled with the adaptability and resilience of cement concrete pavement , able to better meet the requirements of modern traffic ; terms of materials , asphalt supply gap is huge , difficult to guarantee the quality , the higher the requirements of stone , and th

3、e nearest supply cement materials . Therefore , the cement concrete pavement has been rapid development.        An asphalt overlay layer technology application classification        Using asphalt surface layer as the ori

4、ginal pavement overlay reinforcement is a very typical approach , pavement structure can absorb the advantages of this form of the two materials , the original concrete pavement can provide a stable, solid base, asphalt overlay layer can provide a high coefficient of friction , good flatness of the

5、surface layer , which greatly improves the performance pavement. Before asphalt overlay , you must destroy the original pavement appropriate treatment , to ensure the normal asphalt overlay layer construction and fully play its role. These treatments include the following aspects: settlement deal wi

6、th weak foundation ; processing surface damaged ; fracture plate processing ; broken plates Treatment .        Broken plates on concrete pavement repair measures have been part of our country in recent years to explore research units . In early studies , usual

7、ly once found broken plates , then eliminating all the plates , and the entire board laying steel mesh , so that it can work independently. However, this method is time-consuming and laborious, and uneconomical , and affect the normal operation of traffic , has not used. After the concrete road surf

8、ace plate actually happened , does not mean that has been completely lost value.        2 less than 3mm wide crack repair broken plate        2.1 directly poured into law: concrete produced in the applicable construction

9、 shrinkage cracks. In before the opening , once found cracks in the concrete slab , polysulfide epoxy materials available direct infusion .        2.2 syringe injection method: This method is suitable for the opening of a short time, within a few cracks in the

10、 debris , cleaner , dry crack width of about 3mm board repair broken pavement . Specific steps are as follows : clean seam : the use of an air compressor with a special nozzle to blow in the gap , and a small hook with a thin wire to make full dig dirt and other debris in the gap ; with pouring mate

11、rial : the small package main agent and curing agent blending ratio of 2:1 . Generally small package of 1kg, mixture of A and B barrel main agent 0.67kg 0.33kg two barrels barrels curing agent , curing agent when operating just directly into the main agent , stirring until evenly color ; syringe inj

12、ection: use 50ml medical syringe pumped into the mixture , aligned into the slit injection , injection point by point by the middle to the sides to fill the gap . If the first injection of a paragraph into more timely recharge to full, if you can penetrate within 15min no longer considered to have f

13、illed the gap , the entire gap injection, sprinkle a little sand mixed with dry cement mix coverage , you can open after 3h traffic. The operation should be completed within 90min ingredients start , otherwise the material will solidify and can not be used.       &

14、#160;3 local repair concrete board        " Highway Maintenance Technical Specifications " (JTJ073-96) provides concrete pavement broken slab saws can be used in addition to the local bar overlay repair method. Requirements transverse incision surfac

15、e 7mm deep ( non- full- thickness patch ) , parallel plate off each side 15cm width ( distance between the two slits should be considered off to determine the degree of bending plate fracture ) , extended in the vertical direction 30cm off the board the minimum diameter of 12mm, spaced not more than

16、 20cm, breaking plates parallel transverse banding minimum diameter 6mm, 2 3 roots twisted steel mesh . Then, on 7 12cm deep and clean surface drilling , and low water-cement ratio of grout coating or resin binder , and then pouring the same color high-strength concrete shrinkage compensation , trim

17、med with the road surface smoothness and anti-slide the same structure . According to this provision , depending on the extent of damage to the board broken in three different ways Patch :        3.1 slight fracture treatment for minor faults , cracks a slight

18、 peeling , first draw a line stakeout , according to drawing a line cut into rectangular groove depth range of about 5 7cm , and scrub clean after , filled with fast-setting concrete stones . 3.2 cracks wider treatment for minor faults , but the cracks wider and slightly peeling off the board ,

19、 on both sides of the crack should be at least 20cm width of each loft, by drawing a line into a deep cut to a thickness range of half the groove this groove should be perpendicular to the center line , scrub and clean the groove in the bottom of the groove with the impact of drilling on both sides

20、of the crack along a direction parallel to the center line spacing 30 40cm, drill through the thick grass to the plate surface , and then clean out the recess grooves and perforations in the shape install reinforced eyelets , impact drill with 30 specifications, shape threaded steel rebar production

21、, after the completion of steel erection , high strength cement mortar hole to dense packing , and finally with the same intensity as the original pavement levels of fast-setting concrete pouring to be flush with the pavement .        3.3 thorough treatment of

22、 a more radical approach is to chisel through the thickness of the grooves in the sides of the groove edge thickness of the central holes, deep 10cm, diameter 4cm, horizontal spacing of 30 40cm. Each hole should first wetting it around , insert a diameter of 18 20cm, length 20cm steel , then fast-se

23、tting cement mortar filling tamping, such as mortar dry after pouring concrete tamping hard to be flush with the road that available .        Void board for 4        Treatment after using grouting , the principle of this

24、 method is the duct grouting post -tensioned members learn concrete panel at the bottom of the Void drilling holes through the use of high-strength pressure liquid material into the void void , liquid solidification have a certain strength of the panel to produce uniform supporting role , and thus a

25、chieve the purpose of a solid plate .        4.1 grouting material into the board at the end of the material has the following characteristics: First, the small particle size , mobility, smooth pressed into plate bottom gap ; Second, weak contraction , can ful

26、ly fill the gap bottom plate . Emulsified asphalt for use at home and abroad have experienced caulking materials , although has good mobility, but low strength, and affected by temperature , easy softening temperature is high, easy to squirt under load from the bottom plate , therefore should not be

27、 optional . The choice of pure mud for testing , to achieve liquidity normal construction , you need a lot of water-cement ratio , resulting in material strength and low shrinkage bleeding . It was found that the choice of fly ash cement paste , using a low water-cement ratio can achieve better mobi

28、lity, and high strength, low shrinkage . Using cement : fly ash : water = 1:0.5:0.45 mix mortar specimens produced , its interior three days compressive strength greater than 5MPa, can be used as grouting material.        4.2 Common grouting equipment - fillin

29、g machine filling machine is designed for the end of Highway Cement Concrete Pavement maintenance equipment at the pouring of concrete . Features: self- motivation, set power generation, pulp , grout and water in one, suitable for mobile field operations in various environments ; hydraulic main comp

30、onents made of imported original supporting scientific and reasonable structure , simple operation, easy maintenance ; a pressure overload protection device , with good security and reliability ; way mixing , rapid and uniform , continuous grouting, high working efficiency.    &#

31、160;   The survey found that the majority of the concrete pavement that appear broken boards, broken boards and other diseases due to squirt mud void formation , and thus the bottom plate of this type are void and should be grouting . Intact without breaking the broken plate, a bottom

32、 plate may also exist off the air , this type of de- empty plate , although more difficult to judge , but still take the appearance of observation and deflection testing a combination of methods to judge. Squirt mud after the rain on the road to see if the most intuitive , no rain season is to take

33、an indirect way to determine: people feel at the edge of a vertical displacement of the plate and the plate when Alice moving through heavy vehicles : two diagonally adjacent plate seam caulk severe spalling plate ; dislocation occurs between adjacent panels , the lower position of the plate are gen

34、erally void exists. Difficult to determine the appearance of the plate , can be measured deflection , deflection values of the four corners over 0.3mm who need grouting .水泥混凝土路面是一种刚度大、扩散能力强、稳定性好的路面结构。随着修筑里程的增长，实践经验的积累，科学研究的深入，水泥混凝土路的修筑技术逐步改进，质量不断提高。加之水泥混凝土路面的适应性及抗灾能力强，能较好的满足现代化交通的要求；就材料而言，沥青供应缺口很大，质

35、量不易保证，对石料的要求较高，而水泥材料可就近供应。因此，水泥混凝土路面得到了较快地发展。 1 沥青罩面层技术应用分类 采用沥青面层作为原路面的罩面层是一种非常典型的补强方法，这种形式的路面结构能吸收两种材料的优点，原有水泥路面可以提供稳定、坚实的基层，沥青罩面层可以提供摩阻系数高、平整度好的表面层，大大改善了路面的使用性能。在进行沥青罩面之前，必须对原路面的破坏进行相应的处理，保证沥青罩面层的正常施工，充分发挥其作用。处理包括下面这些方面：沉陷、软弱地基的处理；表面破损的处理；断裂板处理；断裂板处治。 关于混凝土路面断板的修补措施，我国在近几年已有部分单位进行研究探讨。在研究初期，一般是一旦

36、发现断板，则将该块板全部刨除，并整板铺设钢筋网，使之能够独立工作。但这种方法既费时费力，又不经济，同时影响交通的正常运行，目前已不采用。实际上混凝土路面断板发生后，并不能说明已经完全丧失使用价值。 2 裂缝宽小于3mm的断板修补 2.1 直接灌入法：适用于施工中产生的混凝土收缩裂缝。在未通车前，一旦发现混凝土板出现裂缝，可用聚硫环氧树脂材料等直接灌注。 2.2 注射器注射法：此法适用于通车时间短，裂缝内杂物少，较清洁、干燥裂缝宽度在3mm左右的路面断板修补。具体工序如下：清缝：采用空气压缩机配特制喷嘴吹于缝隙，并用细铅丝小钩子充分掏尽缝隙中的泥土等杂物；配灌缝材料：将小包装主剂与固化剂按2：1

37、比例掺配。一般小包装为1kg，混合剂分A桶主剂0.67kg和B桶固化剂0.33kg二个桶装，操作时只需将固化剂直接倒入主剂中，搅拌至颜色均匀即可；注射器注射：使用50ml医用注射器抽入混合剂，对准插入缝隙注射，由中线向两边逐点注射至缝隙填满。若先注射段落渗入较多，应及时补注至饱满，若15min内不再渗入则可认为已注满缝隙，整个缝隙注射完成后，撒少许干水泥拌砂混合料覆盖，3h后即可开放通车。该操作应在配料开始90min内完成，否则材料将凝固，无法使用。 3 水泥混凝土板面局部修补 公路养护技术规范(JTJ073-96)规定，混凝土路面断板可以采用局部条块锯除罩面修复法。要求横向切开表面7mm深(非全厚度的修补)，平行断板两侧各15cm宽(两条切缝的距离应视断板裂缝的弯曲程度确定)，在垂直断板方向上加长30cm，最小直径12mm，间距不大于20cm，平行断板横向绑扎最小直径6mm，23根的螺纹钢筋网。然后，在凿开的712cm深以及清理干净的表面上，涂低水灰比的水泥浆或树脂粘结剂，再浇筑同颜色高强补偿收缩混凝土，表面修整成与路面平整度及抗滑构造相同。根据此规定，视板面断裂损坏程度不同分三种方式修补： 3.1 轻微断裂的处理 对于轻微断裂，裂缝有轻微剥落的