Selection of suitable grouting equipment requires comprehensive consideration of the type, width and depth of the cracks, as well as the traffic conditions of the pavement, the construction environment and other factors, the following is the specific selection method:
Crack Characteristics
Crack type: For regular straight cracks, general grouting equipment can handle them better; for irregular cracks or cracks with more branches, it may be necessary to choose equipment with higher flexibility, such as grouting machines with adjustable nozzles or capable of multi-angle grouting, in order to better adapt to the shape of the cracks and to ensure the quality of grouting.
Crack width: If the crack width is small, e.g. less than 5 mm, a small portable grouting machine can be used with a thin nozzle to accurately inject sealant into the narrow crack. When the crack width is between 5 - 15 mm, you can choose medium-sized grouting equipment, which usually has a moderate volume of material and pressure, and can fill medium width cracks better. For wide cracks wider than 15 mm, larger machines, such as asphalt pouring crack fillers with larger asphalt storage tanks and high pressure delivery systems, are required to ensure that there is sufficient material and pressure to fill the cracks.
Crack Depth: Deeper cracks require equipment that can provide sufficient material fill and pressure to allow the sealant to reach the bottom of the crack. For cracks deeper than 3 centimeters, it is recommended to choose grouting equipment with depth adjustment or high filling pressure to ensure that the crack is completely filled and to prevent voids or underfilling.
Road traffic conditions
Traffic flow: grouting construction on roads with high traffic flow requires the selection of equipment with high construction efficiency to reduce the impact on traffic. For example, large-scale automated grouting equipment, which travels faster and has high grouting efficiency, is able to complete a large number of grouting jobs in a relatively short period of time. In the smaller traffic flow of roads or neighborhood roads and other places, you can choose a small, relatively flexible operation of the grouting equipment, even if the construction speed is a little slower, it will not have too much impact on the traffic.
Open Traffic Time Requirements: If you need to open traffic quickly after grouting, you need to choose grouting equipment that uses fast-drying sealants, and the equipment's grouting process should be able to ensure that the sealant cures in a short period of time to meet the requirements of vehicular traffic. Some of the advanced heating technology and special sealant grouting machine, can make the sealant in the grouting within a few minutes to achieve the initial curing, can meet the rapid opening of the traffic demand.
construction environment
Construction site size: in the spacious road construction site, you can use large grouting equipment, its mobility, although relatively poor, but because of the open site, does not affect the operation of the equipment and driving. And in the narrow space of the construction area, such as alleys, parking lot corners, etc., small portable grouting equipment is more suitable, they are small, flexible operation, can be in a limited space for construction.
Ambient temperature: the ambient temperature has a greater impact on the grouting construction. In the low temperature environment, the viscosity of the sealant will increase, the fluidity becomes poor, which requires the grouting equipment has good heating performance, can be heated to the appropriate construction temperature of the sealant. Some grouting machines with efficient heating systems can quickly heat the sealant to about 180℃ - 200℃ in a low-temperature environment to ensure its fluidity and construction effect. In a high temperature environment, pay attention to the heat dissipation of the equipment and the sealant cooling and curing speed, to avoid the sealant due to high temperature and flow or curing time is too long.
Cost and efficiency
Equipment price: the price of different types and brands of grouting equipment varies greatly. When choosing, it is necessary to consider according to their own budget. If the budget is limited, you can choose some cost-effective domestic small grouting equipment for small-scale pavement maintenance. If it is a large professional maintenance company with enough capital investment, you can choose imported high-end grouting equipment, whose performance and quality are more reliable, and can improve the construction efficiency and quality.
Running costs: including fuel consumption of the equipment, the amount of sealant used, maintenance costs of the equipment, etc.. Some large grouting equipment, although the construction efficiency is high, but the fuel consumption and sealant usage is large, maintenance costs are relatively high. Small equipment is relatively low in these aspects. Need to consider the long-term operating costs of the equipment, choose economical and practical grouting equipment.
Construction efficiency: according to the area of pavement to be maintained and the requirements of the construction period, choose equipment that can meet the construction progress. If the schedule is tight and the task is heavy, you should choose the equipment with fast grouting speed and high automation, such as the grouting machine with automatic control system and fast heating device, which can improve the construction efficiency and ensure the completion of the task on time.