Concrete grass planting bricks are specially used for laying on urban pedestrian roads and parking lots. Bricks and hollow blocks with grass planting holes can green roads and ground works. Its surface can be surface (material) or no surface (material), natural color or color. The coverage rate of concrete grass planting brick lawn can reach 30%.
There are great differences in processing technology, construction technology and detection methods between pavement bricks and grass planting bricks. There is no ready-made control method or unified test standard for reference. It is really necessary for relevant parties to establish objective, scientific and accurate detection methods;
(1) In addition to meeting the basic performance of ordinary pavement bricks, such as the technical requirements of appearance quality, mechanical performance, physical performance, etc., there should be certain restrictions on the bulk density, size, hollowness and other aspects, especially the opening holes of the materials themselves, to prevent plant roots from entering the block and rotting, affecting the service life. At the same time, in terms of block thickness, Ensure that plants have sufficient growth soil to meet the requirements of convenient and quick construction and transportation.
(2) The construction technology should break through the traditional construction methods. The base course is paved with granular materials with good drainage and strength meeting load requirements, and the surrounding drainage blind ditch; Before grass planting, according to the arrangement of block holes, the drainage pipes of about 15mm each hole communicate with the upper and lower layers. This method can be reserved when pouring the concrete support layer, or it can be opened immediately with an electric hammer. However, before soil filling, drainage and ventilation must be done well. The cushion layer thickness is 30~50mm rubble (cobble), and then it is planted with soil. The soil compactness should be controlled within 90% (light compaction test).
(3) Test. The detection of technical indicators of straw brick engineering mainly includes the content of soil organic matter, raw material test and the compliance of brick technical parameters (such as 3). 1. But the key is to control the mechanical properties of the brick, and determine the test method of compressive and flexural strength according to its shape and size; When all rib widths of the test piece do not meet the requirements in A1 of Appendix A of the pavement tile standard, a part shall be cut in the block for test, but must meet 100 × one hundred × The volume requirement of 100mm cube, otherwise the flexural strength must be tested whether the ratio of side length to thickness is greater than 5 times; The bending strength test shall also be carried out at the position where the resistance moment of the section is small according to the shape of the inner hole of the plate to determine the bending damage load; At the same time, the large force value of the test equipment shall be controlled within the effective range of 20%~80%, and meet the accuracy requirements of Level I. The compactness of the subgrade shall be tested by the ring knife method to ensure that it meets 95% of the standard for isometric compaction test, and there is no frost boiling and "spring" phenomenon.
(4) Check and accept, control the hollowness index, appearance quality, product inspection report, etc. of the bricks used in advance, focus on checking the granular cushion, drainage slope or flow direction of blind ditch, drainage channel permeability, coarse material grading, meet the ventilation and drainage conditions of upper and lower drainage pipes, and check whether the laying of each structural layer meets the requirements of the design drawings, Control the process age requirements of each layer of materials, and sample and verify the parts with uncertain strength at any time; Strengthen the supervision and inspection of the protection of finished and semi-finished products; The acceptance work is carried out in two stages, one is the acceptance of civil works to meet the requirements of flatness, color perception and parking load of small vehicles, and the other is the acceptance of grass planting to meet the requirements of plant life cycle survival rate indicators.
The application of new materials often lacks relevant application, testing, acceptance standards or specifications of products in a certain period of time. It is necessary to explore and accumulate relevant technical information. It is necessary to explore and accumulate relevant technical information, communicate with each other, identify each other, use standardized product management, standardize the market and construction, and then promote.
Pinghu Huafeng Cement Products Factory is a large enterprise engaged in cement products for a long time Cement brick The manufacturer specializes in producing cement pipes, U-grooves, square piles, cement piles, road bricks Cement grass planting brick 、 Cement tile Concrete square piles, solid square piles, cement sewer pipes, concrete cement pipes, curbstones, curbstones, and other cement products, welcome new and old customers to consult and negotiate! //www.jxhfslzp.com Service hotline: 130-9562-2833 (Manager Yu)
