The Application of Concrete Pavement to Aggregate Technology in Construction

Over the past two years, there has been a gradual improvement in cement road surfaces, and an increasing number of asphalt road renovation projects. The cement road surface crushing technology, by treating the existing road surfaces through crushing, laying asphalt layers, has enhanced material utilization. What was once a cement road surface is now treated with the crushing technology and paved with asphalt. Let's take a look at the application of this cement road surface crushing technology in construction together!

Pre-construction Preparation

When undertaking this work of raw material procurement, attention must be given to controlling the source of materials and selecting suppliers with good quality. Then, check the materials chosen for construction according to the construction requirements. Of course, if the inspection results are satisfactory, a report must be submitted to the relevant departments and the results must be randomly checked. Only after passing various inspections can the material be released for use. Under necessary conditions, a portion of the samples may be taken for further testing. Before materials are delivered to the site, relevant personnel should manage the process, ensuring the cleanliness of the storage area and preventing contamination of the materials. Additionally, when stacking the stone materials, please pay attention to the handling of dividers and insert identification cards.

1) Concrete: When selecting concrete materials for construction, options such as silicate cement and slag silicate cement can be used for the subgrade of road surfaces. During this process, it is advisable to avoid using rapid-hardening cement or materials that are easily affected by the surrounding environment. In the engineering case used in this article, Dongtai Laida Cement Factory's PO.32.15 early strength and delayed setting cement is primarily employed. Its main specifications are shown in Table 1.

2) The primary material used for the crushed stone is limestone. The specific operation involves selecting four different sizes of particle sizes, which are then processed and discharged. The specifications are shown in Table 2.

3) Water) Choose water that is safe for both humans and animals to drink.

Aggregate Design for Cement Concrete Pavement Rubbleization Technique

1) Select construction materials on-site. First, calculate the proportion of each aggregate based on the particle composition method. At the same time, maintain the throughput of 4.75mm and 0.075mm within the specified incline range.

During the material preparation process, it is necessary to conduct certain tests on the cement used on-site construction and group the construction materials based on the varying amounts of cement. In actual testing, the mixture is typically blended in proportions of 3.5%, 4%, 4.5%, and 5% of the general cement content, using the heavy-tamping method to determine moisture content and dry density to meet construction requirements.

3) The process requires limiting the usage of several materials. Construction workers can restrict cement usage while ensuring the required strength for construction; when dealing with silt content, the usage of fine aggregates and powders should be limited.

4) Once the moisture content is determined, the cement-stabilized aggregate mix can be blended, with its compaction to be controlled according to construction standards. The mixture samples should be cured during the preparation process, with a curing period of about 6 days. After completing the above work, an infinite compressive strength test must still be conducted on it.

Site preparation underway

Firstly, inspect the road surface appearance, particularly the road base elevation and centerline deviation.

2) When inspecting the subgrade, attention should be paid to the compaction test. For sections that do not meet construction requirements, appropriate measures should be taken to address them until these sections meet the construction standards.

3) Maintain the cleanliness of the base surface and water it appropriately to keep it moist.

Before the construction of the cement road surface, the measurement and layout of the road must be completed. To ensure the accuracy of the road end compaction measurement, a certain number of sleepers can be supported at both ends of the end face. During this process, staff can carry out wire rope installation based on the loose spreading coefficient. To make the obtained loose spreading coefficient consistent with the actual situation, the measurer can use the relative coordinate measurement method. The specific operation of this method is to fix the instrument, and the workers measure the relative elevation of the subgrade and subgrade, before and after compaction. The loose spreading coefficient needs to be calculated using these data according to the relevant formulas.

The Challenge of Lian He Lou

Construction workers should conduct trial production before the formal construction begins. The primary purpose is to observe whether the mixed building materials are functioning properly, particularly in terms of controlling the quantities of various materials to meet the project's requirements.

Stabilized Soil Aggregate Construction Method

Stabilized Stone Aggregate Mixing

In the engineering case selected for this paper, a WDB500 mixer was chosen for the stabilized sand and gravel mixing machine. The feature of this unit is that it has five hoppers, each capable of producing up to 500 tons within one hour; metal mesh covers are installed on the hopper openings for timely material screening.

2) The buckets, oil tanks, and other equipment used during construction are all equipped with high-precision dynamic computers, which are also calibrated by the measurement department.

3) Construction personnel must produce mixed materials in accordance with specific ratios. Additionally, tests to check the mixture gradation are required, including cement quantity titration and strength tests.

Steady Gravel Transportation

1) Recharging: Follow the arrangement of the recharger. Work methodically and avoid using an excessive amount of material. 2) Coverage: Staff must use oil cloths to protect the mixture. 3) When reversing to recharge vehicles, the brakes must be applied 30cm before the booth. Additionally, the driver must engage neutral during the unloading process.

Stabilized Gravel Mattress

During construction, the selection of pavers with similar performance is crucial for the stone-milling technique on cement road surfaces. Pay close attention to the adaptation between the renovation width and design width of the site at this stage. The paving elevation control differs near the central reservation and near the shoulder; the former uses steel wire standards for single-side elevation, while the latter primarily employs a double longitudinal control method. Within the paver, note that the overlap width is nearly 20 cm, and the distance between the front and back is within 6 meters. Prepare 4-6 paver waiters to prevent unexpected halts during construction. Control the paving speed during application and promptly check the paving layer thickness; adjust as necessary if it does not meet the construction requirements. Maintain a balanced speed for the spiral distributor during feeding, and position the discharge slightly above two-thirds of the spiral distributor to effectively prevent segregation. To enhance paving management, assign professionals to inspect the paving thickness and flatness. In case of local issues identified during construction, notify relevant units promptly to take corrective actions. Do not change the site speed freely or interrupt site operations arbitrarily.

The above introduces the application of the cement road fracturing technology in construction. For more information, please feel free to contact us at any time!