Cement blanket pavement construction method and test method

Abstract

The invention relates to the technical field of cement blanket construction, in particular to a cement blanket pavement construction method and a test method. The construction method comprises the following steps: S1, pre-watering: watering a substrate until accumulated water is formed on the surface of the substrate; s2, cement blankets are laid, specifically, the cement blankets make contact with accumulated water, and every two adjacent cement blankets are in lap joint; s3, watering and hardening. According to the cement blanket pavement construction method, during construction, accumulated water exists on the base through pre-watering, the bottom of the cement blanket makes contact with the accumulated water, the hardening effect and the hardening speed of the bottom of the cement blanket can be improved, the cement blanket and the base can be connected more tightly, and the anti-sliding capacity of the cement blanket is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cement blanket construction, and in particular to a cement blanket pavement construction method and a testing method. Background Art

[0002] Concrete cement blanket is an innovative building material that combines the characteristics of cement and textile materials. It can quickly harden into a concrete layer in a wet state and is suitable for ditch bottom lining, slope protection, pipeline protection, etc. The latest research shows that the hardness and service life of concrete cement blanket are comparable to those of traditional cement, but it simplifies the construction process, reduces cumbersome construction links, saves human resources, reduces enterprise production costs, and has considerable application prospects.

[0003] The textile materials in cement blankets can be divided into needle-punched type and three-dimensional spacer fabric type according to different processing methods.

[0004] Needle-punched cement blanket is a blanket material made of two layers of geotextile wrapped with cement powder, which is punched, threaded and packaged by a needle-punched machine. Needle-punched cement blanket is easy to process and cheap.

[0005] The three-dimensional spacer fabric cement blanket is a three-dimensional frame built with three-dimensional spacer fabric. The cement powder is vibrated into the three-dimensional spacer fabric in batches until the three-dimensional fabric is evenly and densely filled, and then the surface dust is swept away and sealed. Due to the three-dimensional fiber reinforcement, the cement blanket has higher material strength and durability. At the same time, the three-dimensional fiber structure provides good drape and the ability to adapt to complex shapes. It has good flexibility and toughness, but the price is higher.

[0006] In emergency situations such as natural disasters such as earthquakes, rainstorms, and landslides, cement blankets have excellent adaptability and rapid response capabilities, and can be used in a variety of application scenarios such as rapid transportation, immediate emergency response, the establishment of protective tents, and slope protection construction. In addition, in complex geographical environments such as mountain roads, desert areas, and tidal flats, it provides an innovative and efficient solution for the rapid laying of roads.

[0007] During the construction and use process, technicians found that in the existing cement blanket laying method, the connection between the cement blanket and the ground was not tight enough and the connection strength was low. When vehicles drove on the cement blanket, it was easy to cause the cement blanket to slip relative to the roadbed, posing a safety hazard and making it difficult to adapt to the passage of large vehicles. Summary of the invention

[0008] The purpose of the present invention is to overcome the problem in the background art that cement blanket easily slips relative to the roadbed, and to provide a cement blanket pavement construction method and a testing method.

[0009] In a first aspect, the present invention provides a cement blanket pavement construction method, comprising the following steps: S1. Pre-watering: watering the substrate until water accumulates on the surface of the substrate; S2. Laying cement blankets: laying multiple cement blankets on the base, the cement blankets are in contact with the accumulated water, and two adjacent cement blankets are overlapped; The overlapping position of the cement blanket is fixed to the base using anchor nails; The non-overlapping position of the cement blanket is fixed to the base using U-shaped nails, and the U-shaped nails are arranged in a plum blossom shape; S3. Watering and hardening: Sprinkle water from the edge to the middle of each cement blanket, and the water will penetrate the cement blanket.

[0010] The present invention provides a cement blanket pavement construction method, in which a plurality of cement blankets are overlapped to cover a base, and a hydration reaction occurs after the cement blankets are watered, so that their hardness is greatly improved, and the method can be used for rapid hardening of roads in complex environments such as mountainous areas, deserts, and tidal flats; during construction, water is accumulated on the base by pre-watering, and the bottom of the cement blanket is in contact with the accumulated water, which can not only improve the hardening effect and hardening speed of the bottom of the cement blanket, but also make the connection between the cement blanket and the base tighter, and improve the anti-slip ability of the cement blanket; the cement blanket is fixed to the base with anchor nails and U-shaped nails, which can further improve the anti-slip ability of the cement blanket, so that it can carry large vehicles for passage; the cement blanket will expand and increase after being watered, and water can be sprinkled from the edge to the middle of each cement blanket, so that the cement blanket with increased volume can be squeezed inward, and the flatness of the cement blanket can be improved.

[0011] Preferably, at the overlapping position, sealant or plain ash is coated between the two cement blankets; or, cement ash is sprinkled on the joints and seams of the two cement blankets.

[0012] The connection strength between adjacent cement blankets can be improved by using sealant, plain ash or cement ash. In combination with anchor nails, the strength and stability of the overlapped position can be no lower than that of the material itself, which is beneficial to improving the integrity of the hardened pavement. Preferably, in step S3, water is sprayed in a spraying manner; the spraying flow rate is 3000-5000 mL / min.

[0013] Using spraying to water can avoid washing out the cementitious materials in the material, which is beneficial to improving the smoothness and consistency of the hardened road surface.

[0014] Preferably, before laying the cement blanket, a pit is dug under the overlapping position, the depth of the pit corresponds to the thickness of the cement blanket, and the lower cement blanket at the overlapping position is placed in the pit.

[0015] By digging pits, the height difference of the cement blanket surface at the overlapping position can be reduced or eliminated, which is beneficial to improving the flatness of the hardened road surface.

[0016] Preferably, the overlap width of two adjacent cement blankets is ≥10 cm; The thickness of the cement blanket is ≥10mm; The amount of water per square meter should be ≥9kg.

[0017] Preferably, the method further comprises step S5: cement blanket maintenance: When the air temperature is below 5°C, insulation measures are taken on the surface of the cement blanket; When the air temperature is higher than 30° C., the surface of the cement blanket is covered with a plastic film and kept moist.

[0018] Preferably, the cement blanket comprises a woven mesh and dry concrete, wherein the dry concrete is formed by mixing cement, gypsum, quartz sand, fiber and additives; The braided mesh is formed by braiding polyethylene and polypropylene filaments.

[0019] Preferably, the additive includes at least one of fly ash, blast furnace slag and alkali activator.

[0020] By adding fly ash, blast furnace slag and alkali activator, the cement blanket can have excellent mechanical properties, fast hardening speed, significant early strength, and excellent high temperature resistance, heat insulation, acid and alkali corrosion resistance and other properties.

[0021] Preferably, the substrate is a tidal flat, desert soil or mud.

[0022] In a second aspect, the present invention provides a cement blanket pavement testing method, comprising a test pavement, the test pavement comprising at least two cement blankets arranged in a transverse overlap, the test pavement being constructed using the cement blanket pavement construction method as described above; The steps include: A1. Marking each hardened cement blanket to form a small vehicle test track and a large vehicle test track; A2. The corresponding test vehicle rolls back and forth along the corresponding test track for 5, 10, 20, 30, 40 and 50 times respectively. The cement blanket samples after the 5th, 10th, 20th, 30th, 40th and 50th rolling on the test track are respectively taken for residual compression and flexural tests.

[0023] The present invention provides a cement blanket pavement testing method, which can conveniently and intuitively test the bearing capacity of the cement blanket pavement for small and large vehicles, comprehensively evaluate the strength and stability performance of the cement blanket under different usage conditions, and provide a reference for planning pavement use.

[0024] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a cement blanket pavement construction method, in which a plurality of cement blankets are overlapped to cover a base, and a hydration reaction occurs after watering the cement blankets, greatly improving their hardness, and the method can be used for rapid hardening of roads in complex environments such as mountainous areas, deserts, and tidal flats; during construction, water is accumulated on the base by pre-watering, and the bottom of the cement blanket is in contact with the accumulated water, which can not only improve the hardening effect and hardening speed of the bottom of the cement blanket, but also make the connection between the cement blanket and the base tighter, improve the anti-slip ability of the cement blanket, and fix the cement blanket on the base with anchor nails and U-shaped nails, which can further improve the anti-slip ability of the cement blanket, so that it can carry large vehicles; the cement blanket will expand and increase after watering, and water can be sprinkled from the edge to the middle of each cement blanket, so that the cement blanket with increased volume can be squeezed inward, and the flatness of the cement blanket can be improved.

[0025] 2. The cement blanket pavement testing method provided by the present invention can conveniently and intuitively test the bearing capacity of the cement blanket pavement for small and large vehicles, comprehensively evaluate the strength and stability performance of the cement blanket under different usage conditions, and provide a reference for planning pavement use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the arrangement of the cement blanket of the present invention (top view); Figure 2 It is a cross-sectional view of the cement blanket and substrate of the present invention; Figure 3 for Figure 2 Enlarged view of part A in the middle; Figure 4 The figure is a schematic diagram of the layout of the test track of the present invention.

[0027] Markings in the figure: 1- Cement blanket; 11-lap joint position; 12-anchor nail; 13-U-shaped nail; 2- substrate; 21- pit; 3- Small car test track; 4-Large vehicle test track. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0029] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0031] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0032] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0033] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0034] Example 1 See also Figure 1-3 This embodiment provides a cement blanket pavement construction method, comprising the following steps: S1. Pre-watering: watering the substrate 2 until water accumulates on the surface of the substrate 2; S2. Laying cement blanket 1: laying multiple cement blankets 1 on the base 2, the cement blanket 1 is in contact with the accumulated water, and two adjacent cement blankets 1 are overlapped; The overlap position 11 of the cement blanket 1 is fixed to the base 2 using anchors 12; The non-overlapping position of the cement blanket 1 is fixed to the base 2 using U-shaped nails 13, and the U-shaped nails 13 are arranged in a plum blossom shape; S3. Watering and hardening: Sprinkle water from the edge to the middle of each cement blanket 1, and the water will thoroughly soak the cement blanket 1.

[0035] The cement blanket 1 is also known as concrete canvas, which includes a matrix formed by mesh bag weaving and dry concrete filled in the matrix. The dry concrete is made of a special formula. The appearance of the cement blanket 1 is a soft cloth-like structure that can be bent and curled for easy transportation and storage. When the cement blanket 1 meets water, the dry concrete inside it undergoes a hydration reaction. The hydration reaction will harden the originally soft cement blanket 1 and have a certain bearing capacity, which is suitable for the hardening of foundation pits, slopes and roads.

[0036] The designed bedding position on the base is wetted in advance by pre-watering, and water is formed on the surface of the designed bedding position. The water refers to the liquid water retained on the surface of the base 2. When the cement blanket 1 is laid on the designed bedding position, the bottom surface of the cement blanket 1 contacts the water, so that the dry concrete near the bottom surface of the cement blanket 1 undergoes a relatively sufficient hydration reaction, thereby improving the hardening speed and hardening effect of the bottom surface of the cement blanket 1, so that the cement blanket 1 is fully hardened. Moreover, after the water intrudes from the bottom surface of the cement blanket 1, part of the dry concrete will precipitate out of the cement blanket 1 matrix along with the intruding water and flow to the base 2. After the precipitated dry concrete is hardened, it can improve the connection strength between the cement blanket 1 and the base 2, thereby reducing the slip probability of the cement blanket 1 relative to the base 2, so that the cement blanket 1 can carry large vehicles to pass.

[0037] The longitudinal direction of the base 2 refers to the extension direction of the road surface formed by the construction of the cement blanket 1, and the transverse direction of the base 2 is perpendicular to the longitudinal direction; in step S2, the cement blanket 1 is transported to the designed laying position, at least two cement blankets 1 can be arranged in the transverse direction, and adjacent cement blankets 1 are overlapped, and at least two cement blankets 1 can also be arranged in the longitudinal direction, and adjacent cement blankets 1 are overlapped.

[0038] The overlapping position 11 refers to the overlapping portion of two adjacent cement blankets 1, which has at least two cement blankets 1 arranged up and down; the non-overlapping position refers to the portion of the cement blanket 1 other than the overlapping position 11, which has only one cement blanket 1 in the vertical direction. The overlapping position 11 is fixed by anchors 12, which are sequentially passed through the two cement blankets 1 and driven into the base 2. Figure 3 As shown; the overlap position 11 is usually strip-shaped, and the anchors 12 are spaced along the overlap position 11. The anchors 12 are arranged through two cement blankets 1 to improve the connection strength between adjacent cement blankets 1, so that the connection strength of the overlap position 11 is not lower than the main strength of the cement blanket 1.

[0039] The non-overlapping position is fixed with a U-shaped nail 13, which is approximately U-shaped and includes two adjacent nail pins and a connecting portion connecting one end of the two nail pins. The nail pin of the U-shaped nail 13 passes through the cement blanket 1 and is driven into the base 2. The two adjacent nail pins can enhance the connection strength between the cement blanket 1 and the base 2. The connecting portion makes it easy to pull out the U-shaped nail 13, which is beneficial for the later removal of the cement blanket 1.

[0040] The U-shaped nails 13 can be arranged in a plum blossom shape on the cement blanket 1, such as Figure 1 As shown, the plum blossom arrangement refers to an arrangement in the shape of plum blossom petals, including multiple rows arranged at intervals, each row including multiple U-shaped nails 13 arranged at intervals, and the U-shaped nails 13 of two adjacent rows are arranged in a staggered manner. The spacing between adjacent U-shaped nails 13 is preferably 2 to 3 meters. The plum blossom arrangement can improve the uniformity of the connection between the cement blanket 1 and the substrate 2, and reduce or avoid the occurrence of weak strength areas.

[0041] After the cement blanket 1 is laid and fixed, water is sprinkled on each cement blanket 1 in the order from the edge to the middle, and the amount of water sprinkled is appropriate to fully water the cement blanket 1. The dry concrete in the cement blanket 1 undergoes hydration reaction when it meets water, and its volume increases compared with the original dry concrete. Sprinkling water from the periphery to the middle can utilize the volume increase of the concrete at the edge of the cement blanket 1 to generate an extrusion force toward the middle, and the mutual extrusion between the cement blankets 1 can improve the density of the concrete inside the cement blanket 1 and improve the flatness of the surface of the cement blanket 1.

[0042] The present embodiment provides a cement blanket pavement construction method, in which a plurality of cement blankets are overlapped to cover a base, and a hydration reaction occurs when the cement blanket is watered, greatly increasing its hardness, and can be used for rapid hardening of roads in complex environments such as mountainous areas, deserts, and tidal flats; during construction, water is accumulated on the base by pre-watering, and the bottom of the cement blanket is in contact with the accumulated water, which can not only improve the hardening effect and hardening speed of the bottom of the cement blanket, but also make the connection between the cement blanket and the base tighter, thereby improving the anti-slip ability of the cement blanket, and fixing the cement blanket on the base with anchor nails and U-shaped nails can further improve the anti-slip ability of the cement blanket, so that it can carry large vehicles; the cement blanket will swell and increase after being sprinkled with water, and water can be sprinkled from the edge to the middle of each cement blanket, so that the cement blanket with increased volume can be squeezed inward, thereby improving the flatness of the cement blanket.

[0043] Preferably, before step S1, the surface of the base 2 is leveled to remove sharp stones and debris on the surface of the base 2; in step S2, the two cement blankets 1 are first fixed by anchor nails 12. The anchor nails 12 are easy to install and can quickly achieve the initial fixation of the position of the cement blanket 1, providing a reference for the subsequent fixation of the U-shaped nails 13, which is beneficial to improving the accuracy of the installation position of the cement blanket 1.

[0044] Preferably, at the overlapping position 11, sealant or plain ash is coated between the two cement blankets 1; or: the joints and seams of the two cement blankets 1 are sprinkled with cement ash.

[0045] Sealant refers to a sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion; plain lime is made from calcined limestone, and its main components are calcium oxide (CaO) and magnesium oxide (MgO). It has good adhesion and strength, and is also resistant to water and chemical corrosion; cement lime is a building material mixed with cement, silica fume and admixtures.

[0046] The sealant, plain ash or cement ash can improve the connection strength between adjacent cement blankets 1, and cooperate with the anchors 12 to make the strength and stability of the overlap position 11 not lower than the material body, which is beneficial to improve the integrity of the hardened road surface. The length of the anchors 12 is preferably greater than or equal to 50 cm, and the spacing between adjacent anchors 12 is preferably no greater than 10 cm.

[0047] Preferably, in step S3, water is sprayed in a spraying manner; the spraying flow rate is 3000-5000 mL / min.

[0048] Watering by spraying can avoid flushing out the cementitious material in the cement blanket 1, which is beneficial to improving the flatness and consistency of the hardened road surface. Further preferably, for a cement blanket 1 with a thickness of 10 cm, the spraying flow rate is 4000 mL / min.

[0049] Preferably, before laying the cement blanket 1 , a pit 21 is dug under the overlapping position 11 , the depth of the pit 21 corresponds to the thickness of the cement blanket 1 , and the lower cement blanket 1 at the overlapping position 11 is placed in the pit 21 .

[0050] See also Figure 3 A pit 21 is excavated on the base 2 at the overlapping position 11, and the depth of the pit 21 is approximately equal to the thickness of the cement blanket 1. When overlapping, the lower cement blanket 1 is placed in the pit 21, and the upper cement blanket 1 is pressed on the lower cement blanket 1, so that the upper surface of the upper cement blanket 1 is flush with the upper surface of the lower cement blanket 1 outside the pit 21, which can reduce or eliminate the height difference caused by the overlap and make the surface of the cement blanket 1 smoother.

[0051] After the cement blanket 1 is watered and hardened, the pits 21 can also prevent the cement blanket 1 from moving in a direction perpendicular to the pits 21 , thereby improving the anti-slip performance of the cement blanket 1 .

[0052] For the paving of the road surface, if the transportation conditions permit, wide materials should be selected as much as possible to reduce the processing of joints. When paving, the overlap width of the two cement blankets 1 is greater than or equal to 10 cm, so that the ends of the cement blankets 1 can be closed, which is convenient for the anchor nails 12 to be driven in, and the connection strength between the two adjacent cement blankets 1 can be improved.

[0053] The thickness of the cement blanket 1 is preferably greater than or equal to 10 mm. Calculated based on a 10 mm thick cement blanket 1, the watering amount per square meter is ≥ 9 kg. Watering should be thorough and must not be less than required.

[0054] Preferably, the method further comprises step S5: curing the cement blanket 1; in step S5: When the temperature is below 5°C, take insulation measures on the surface of cement blanket 1; When the air temperature is higher than 30°C, the surface of the cement blanket 1 is covered with a plastic film and kept moist.

[0055] The material can only bear the load of personnel and light construction machinery after its strength reaches 10.0MPa; the material must not be knocked or pulled strongly after watering until it reaches the final strength; the material must not be struck with sharp objects.

[0056] Preferably, the cement blanket 1 comprises a woven mesh and dry concrete, wherein the dry concrete is formed by mixing cement, gypsum, quartz sand, fiber and additives.

[0057] Cement, gypsum, quartz sand, fiber and special additives are mixed evenly in proportion to form a special dry concrete mixture, in which cement: gypsum: quartz sand or sand: fiber = 2:1:x:y.

[0058] Polyethylene and polypropylene filaments are used to weave into a fiber mesh with a certain thickness and strength. The dry concrete mixture is evenly coated on the fiber mesh, and the two are closely combined through processing technology.

[0059] Further preferably, the additives include fly ash, blast furnace slag and an alkali activator.

[0060] By adding fly ash, blast furnace slag and alkali activator, the cement blanket 1 can have excellent mechanical properties, fast hardening speed, significant early strength, and excellent high temperature resistance, heat insulation, acid and alkali corrosion resistance and other characteristics.

[0061] Preferably, the substrate 2 is a tidal flat, desert soil or mud.

[0062] Cement blanket 1 quality control and acceptance standards: Observe the appearance according to Table 1 below. Use a steel tape measure to measure the length and width of the product and inspect it according to Table 2 below. Materials should be inspected when they enter the warehouse at the construction site. The appearance quality should comply with the provisions of Table 1, the shape and size should comply with the provisions of Table 2, and the physical and mechanical properties of the materials should comply with the provisions of Table 3.

[0063] After the product has been watered for 28 days, 3 to 5 products are randomly selected, and a 10cm×10cm test block is cut from the middle of the road surface with a tile cutter. The test block is brought back to the laboratory for strength and flexural tests. The test is qualified if the strength reaches 20Mpa and the flexural resistance reaches 2.8Mpa. The test method refers to GB / T7019-2014 "Test Methods for Fiber Cement Products".

[0064]

[0065] When transporting and carrying cement blanket 1, it should not be carried sideways. When carrying a whole pile, it should be lifted and transported by forklift. When transporting over long distances, the transportation vehicle should be flat, dry, and rainproof to prevent collision. It must be placed and unloaded gently during loading and unloading. Throwing and impact are strictly prohibited. It should be stored in a dry and flat warehouse. Products of different specifications and grades should be stacked separately, 20cm away from the ground and 50cm away from the inner wall, with a passage in the middle to avoid sun and rain.

[0066] In the use environment of general areas, the design life of cement blanket 1 is the same as that of concrete. In order to extend the life, it is recommended to carry out maintenance work on the material every 5 to 10 years. General damage, such as some small holes, can be filled with cement concrete; large damage should be found out, the root cause of the disease should be eliminated, and the unusable flexible fast-hardening cement blanket should be cut off at the diseased location with a cutting machine or other equipment, and re-paved with flexible fast-hardening cement blanket after backfilling, leveling, and compacting.

[0067] Example 2 See also Figure 4, this embodiment provides a cement blanket pavement testing method, including a test pavement, the test pavement including at least two cement blankets 1 arranged in a transverse overlap, the test pavement being constructed using the cement blanket pavement construction method described in Embodiment 1; The steps include: A1. Marking each hardened cement blanket 1 to form a small car test track 3 and a large car test track 4; A2. The corresponding test vehicle rolls back and forth along the corresponding test track for 5, 10, 20, 30, 40 and 50 times respectively. The cement blanket samples after the 5th, 10th, 20th, 30th, 40th and 50th rolling on the test track are respectively taken for residual compression and flexural tests.

[0068] Taking a specific project as an example: the small test vehicle is 4 meters long, 1.8 meters wide and weighs 2 tons, while the large test vehicle is 8.2 meters long, 2.35 meters wide and weighs 50 tons.

[0069] In this embodiment, the test road surface includes two cement blankets 1 arranged in a transverse overlap, the small vehicle test tracks 3 on the two cement blankets 1 correspond to different positions of the cement blankets 1 respectively, and the large vehicle test tracks 4 on the two cement blankets 1 also correspond to different positions of the cement blankets 1 respectively.

[0070] During the test, a small test vehicle first rolls back and forth on the small vehicle test track 3 for 5, 10, 20, 30, 40 and 50 times, and takes cement blanket samples on the small vehicle test track 3 after the 5th, 10th, 20th, 30th, 40th and 50th rolling for residual compression and flexural tests; then a large test vehicle rolls back and forth on the large vehicle test track 4 for 5, 10, 20, 30, 40 and 50 times, and takes cement blanket samples on the large vehicle test track 4 after the 5th, 10th, 20th, 30th, 40th and 50th rolling for residual compression and flexural tests.

[0071] The size of the cement blanket sample can be 0.2 m x 0.4 m.

[0072] The cement blanket 1 pavement testing method provided in this embodiment can conveniently and intuitively test the bearing capacity of the cement blanket 1 pavement for small and large vehicles, comprehensively evaluate the strength and stability performance of the cement blanket 1 under different usage conditions, and provide a reference for planning pavement use.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cement blanket pavement construction method, characterized in that: The steps include: S1. Pre-watering: watering the substrate (2) until water accumulates on the surface of the substrate (2); S2. Laying cement blankets (1): laying a plurality of cement blankets (1) on the base (2), wherein the cement blankets (1) are in contact with the accumulated water, and two adjacent cement blankets (1) are overlapped; The overlapping position (11) of the cement blanket (1) is fixed to the base (2) using anchor nails (12); The non-overlapping positions of the cement blanket (1) are fixed to the base (2) using U-shaped nails (13), and the U-shaped nails (13) are arranged in a plum blossom shape; S3. Watering and hardening: water is sprinkled from the edge to the middle of each cement blanket (1), and the water thoroughly permeates the cement blanket (1).

2. The cement blanket pavement construction method according to claim 1, characterized in that: At the overlapping position (11), a sealant or plain ash is applied between the two cement blankets (1); Alternatively, the joints and seams between the two cement blankets (1) are sprinkled with cement dust.

3. The cement blanket pavement construction method according to claim 1, characterized in that: In step S3, water is sprayed in a spraying manner; the spraying flow rate is 3000-5000 mL / min.

4. The cement blanket pavement construction method according to claim 1, characterized in that: Before laying the cement blanket (1), a pit (21) is dug below the overlapping position (11), the depth of the pit (21) corresponding to the thickness of the cement blanket (1), and the lower layer of the cement blanket (1) at the overlapping position (11) is placed in the pit (21).

5. The cement blanket pavement construction method according to claim 1, characterized in that: The overlapping width of two adjacent cement blankets (1) is ≥10 cm; The thickness of the cement blanket (1) is ≥10 mm; The amount of water per square meter should be ≥9kg.

6. The cement blanket pavement construction method according to claim 1, characterized in that: The step S5 is also included: cement blanket (1) maintenance: When the air temperature is lower than 5°C, heat preservation measures are taken on the surface of the cement blanket (1); When the air temperature is higher than 30° C., a plastic film is covered on the surface of the cement blanket (1) and kept moist.

7. The cement blanket pavement construction method according to claim 1, characterized in that: The cement blanket (1) comprises a woven mesh and dry concrete, wherein the dry concrete is formed by mixing cement, gypsum, quartz sand, fibers and additives; The woven mesh is formed by weaving polyethylene and polypropylene filaments.

8. The cement blanket pavement construction method according to claim 7, characterized in that: The additive includes at least one of fly ash, blast furnace slag and alkali activator.

9. The cement blanket pavement construction method according to claim 1, characterized in that: The substrate (2) is a tidal flat, desert soil or mud.

10. A cement blanket pavement testing method, characterized in that: The test pavement comprises at least two cement blankets (1) arranged in a transverse overlap manner, and the test pavement is constructed by using the cement blanket pavement construction method according to any one of claims 1 to 9; The steps include: A1. Marking each hardened cement blanket (1) to form a small vehicle test track (3) and a large vehicle test track (4); A2. The corresponding test vehicle rolls back and forth along the corresponding test track for 5, 10, 20, 30, 40 and 50 times respectively. The cement blanket samples after the 5th, 10th, 20th, 30th, 40th and 50th rolling on the test track are respectively taken for residual compression and flexural tests.

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