Modified concrete pavement with high skid resistance and wear resistance and preparation method thereof

Abstract

The invention relates to the technical field of pavement construction, and particularly discloses a modified concrete high-skid-resistance wear-resistant pavement and a preparation method thereof. The modified concrete high-skid-resistance wear-resistant pavement is formed by pouring modified concrete; the modified concrete comprises the following components in parts by mass: 100 parts of water; 230 to 240 parts of cement; 28 to 30 parts of fly ash; 470 to 480 parts of fine aggregate; 620 to 630 parts of coarse aggregate; 24 to 26 parts of modified whisker; 4-6 parts of an additive; the modified whiskers are obtained by modifying calcium carbonate whiskers with a modifying solution; the modified liquid is a compound of a solvent, bisphenol fluorene, 2, 2 '-diphenyldicarboxylic acid, glycidyl and beta-propiolactone. The wear-resistant pavement material has the advantages that the wear resistance of the pavement is further improved while the pavement has skid resistance.

Description

Technical Field

[0001] The present invention relates to the field of pavement construction, in particular to a modified concrete highly anti-skid and wear-resistant pavement and a preparation method thereof. Background Art

[0002] The road surface is one of the main components of the transportation system and is a part that is in direct contact with vehicles. Anti-skid pavement is usually made by pouring concrete and then making the concrete surface rough, thereby increasing the friction of the road surface and making it less likely for vehicles to slip on the road surface. However, the rough surface will cause the concrete pavement to wear more easily. When the rough surface is worn, the anti-skid performance of the road surface will be greatly reduced. Therefore, there are high requirements for the wear resistance of concrete.

[0003] Wear-resistant fillers are added to existing concrete to improve its wear resistance. However, although the wear resistance of existing wear-resistant concrete has been improved to a certain extent, it is still difficult to meet the needs of long-term use of the road surface, resulting in more frequent maintenance of anti-skid roads and causing greater economic losses. Therefore, there is still room for improvement. Summary of the Invention

[0004] In order to make the road surface have anti-skid performance and further improve the wear resistance of the road surface, the present application provides a modified concrete highly anti-skid and wear-resistant road surface and a preparation method.

[0005] In a first aspect, the present application provides a modified concrete highly anti-skid and wear-resistant pavement, which adopts the following technical solution: A modified concrete highly anti-skid and wear-resistant pavement, which is cast by modified concrete; The modified concrete comprises the following components in parts by mass: 100 parts water; 230-240 parts of cement; 28-30 parts of fly ash; 470-480 parts of fine aggregate; 620-630 parts of coarse aggregate; 24-26 parts of modified whiskers; 4-6 parts of admixture; The modified whiskers are obtained by modifying calcium carbonate whiskers with a modifying liquid; The modified liquid is a compound of a solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and beta-propiolactone.

[0006] By adopting the above technical solution, by specifically selecting bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone to be compounded into a modifying liquid, and after the calcium carbonate whiskers are modified by the modifying liquid, the modified whiskers obtained can significantly further improve the wear resistance of concrete, so that the concrete pavement can still remain resistant to wear for a long time after forming a rough surface, making the pavement's anti-skid performance very long-lasting, reducing the frequency of pavement renovation and maintenance, and having high economic value.

[0007] Preferably, the mass ratio of bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone is 17-19:11-13:8-10:6-8.

[0008] By adopting the above technical solution and specifically selecting the mass ratio of bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone, the components are combined in a specific ratio. The modification effect of the modification liquid on calcium carbonate whiskers is more significant, which can better improve the wear resistance of concrete, make the road surface more durable, and have higher economic value.

[0009] Preferably, the mass ratio of the solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone is 100:17-19:11-13:8-10:6-8.

[0010] By adopting the above technical solution and specifically selecting the mass ratio of solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and β-propiolactone, while ensuring a good modification effect, the waste of raw materials is reduced, the cost is well controlled, and the economic value is further improved.

[0011] Preferably, the solvent is methanol.

[0012] By adopting the above technical solution and specifically selecting methanol as the solvent, the various components can be well dissolved and evenly dispersed in the solvent, thereby exerting a better synergistic effect and achieving a better modification effect on the calcium carbonate whiskers.

[0013] Preferably, the modification method of the modified whiskers is as follows: Step 1) uniformly mixing a solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone to obtain a modified solution; Step 2), placing the calcium carbonate whiskers into the modification solution, maintaining the temperature at 50-60°C, and soaking for 12-14 hours; Step 3), filtering out the whiskers and drying them to obtain modified whiskers.

[0014] By adopting the above technical solution, the modification is made more fully by maintaining a constant temperature of 50-60°C and soaking for 12-14 hours, and the obtained modified whiskers significantly improve the wear resistance of concrete.

[0015] Preferably, the admixture is a compound of a water reducing agent and an early strength agent.

[0016] By adopting the above technical solution and adding water reducing agent and early strength agent, the construction process of concrete is made easier, the operation is simpler during road construction, and the road quality is better guaranteed.

[0017] Preferably, the mass ratio of the water reducer to the early strength agent is 2-3:2-3.

[0018] By adopting the above technical solution and specifically selecting the mass ratio of the water reducing agent and the early strength agent, the effect of improving the quality of concrete is better and the quality of the resulting road surface is better.

[0019] In a second aspect, the present application provides a method for preparing a modified concrete highly anti-skid and wear-resistant pavement, which adopts the following technical solution: A method for preparing the modified concrete highly anti-skid and wear-resistant pavement comprises the following steps: Step 01), cement, fly ash, fine aggregate, coarse aggregate, modified whiskers, and admixtures are uniformly mixed to obtain a premix; Step 02), adding water to the premix and mixing evenly to obtain modified concrete; Step 03), pouring the modified concrete into the formwork, roughening the concrete surface, curing, and demoulding to obtain a modified concrete highly anti-skid and wear-resistant pavement.

[0020] By adopting the above technical solution, the modified concrete highly anti-skid and wear-resistant pavement obtained has good anti-skid effect and good wear resistance, so that the anti-skid performance can be maintained for a long time, the frequency of pavement renovation and maintenance is greatly reduced, and it has high economic value.

[0021] In summary, this application has the following beneficial effects: 1. Since the present application specifically selects bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone to form a modifying liquid, after the calcium carbonate whiskers are modified by the modifying liquid, the modified whiskers obtained can significantly further improve the wear resistance of concrete, so that the concrete pavement can still remain resistant to wear for a long time after forming a rough surface, making the pavement's anti-skid performance very long-lasting, reducing the frequency of pavement renovation and maintenance, and having high economic value.

[0022] 2. In this application, it is preferred to specifically select the mass ratio of bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone so that the components are combined in a specific ratio. The modification effect of the modifying liquid on the calcium carbonate whiskers is more significant, which can better improve the wear resistance of the concrete, make the road surface more durable, and have higher economic value.

[0023] 3. In the present application, it is preferred to select a constant temperature of 50-60°C and soak the modified whiskers for 12-14 hours in the modification method to make the modification more sufficient, and the obtained modified whiskers can significantly improve the wear resistance of concrete. DETAILED DESCRIPTION

[0024] The present application is further described in detail below with reference to the embodiments.

[0025] Example 1 A modified concrete highly anti-skid and wear-resistant pavement, which is cast by modified concrete; Modified concrete includes the following components: Water, cement, fly ash, fine aggregate, coarse aggregate, modified whiskers, admixtures.

[0026] The cement is ordinary Portland cement purchased from Runfeng Cement, standard: PO 42.5R.

[0027] The fly ash was purchased from Hebei Zongrun Mineral Products Co., Ltd., and it was secondary fly ash.

[0028] The fine aggregate was river sand, which was commercially available and had a mesh size of 20-40.

[0029] The coarse aggregate is basalt crushed stone, which is commercially available and has a particle size of 20-25 mm.

[0030] The admixture is a compound of water reducer and early strength agent.

[0031] The water reducer is polycarboxylic acid water reducer, which was purchased from Shandong Tenghua New Materials Co., Ltd.

[0032] The early strength agent is calcium formate, which was purchased from Jinan Yuanlian Chemical Co., Ltd.

[0033] The modified whiskers are obtained by modifying calcium carbonate whiskers with a modifying liquid, wherein the modifying liquid is a compound of a solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and beta-propiolactone.

[0034] Calcium carbonate whiskers were purchased from Shijiazhuang Mayue Building Materials Co., Ltd., 325 mesh.

[0035] The solvent was methanol, which was purchased from Shandong Chuangli New Materials Co., Ltd.

[0036] Bisphenol fluorene was purchased from Wuhan Jushun Chemical Co., Ltd.

[0037] 2,2'-Biphenyldicarboxylic acid was purchased from Wuhan Jushun Chemical Co., Ltd.

[0038] Glycidol was purchased from Hubei Kewode Chemical Co., Ltd.

[0039] β-Propiolactone was purchased from Wuhan Belleye Biopharmaceutical Technology Co., Ltd.

[0040] The preparation method of the modified whiskers is as follows: Step 1) 100 kg of solvent, 17 kg of bisphenol fluorene, 11 kg of 2,2'-biphenyldicarboxylic acid, 8 kg of glycidol, and 6 kg of β-propiolactone were added into a stirring tank at a speed of 40 r / min and stirred for 15 minutes to obtain a modified solution.

[0041] Step 2) 50 kg of calcium carbonate whiskers were added to the modification liquid, kept at a constant temperature of 50° C., and immersed for modification for 12 hours.

[0042] Step 3), filtering out the whiskers and drying them at 110° C. to obtain modified whiskers.

[0043] The preparation method of the modified concrete high anti-skid and wear-resistant pavement is as follows: Step 01), 230kg cement, 28kg fly ash, 470kg river sand, 620kg basalt crushed stone, 24kg modified whisker, 2kg polycarboxylate water reducer, and 2kg calcium formate are put into a stirring tank at a speed of 60r / min, stirred for 15min, and mixed evenly to obtain a premix.

[0044] Step 02), add 100kg of water to the premix, rotate at 120r / min, stir for 5min, mix evenly, and obtain modified concrete.

[0045] Step 03) Pour the modified concrete into the formwork and tamp it down. Scratch anti-skid grooves perpendicular to the length of the pavement on the concrete surface to form a rough surface. Sprinkle water and cure for 3 days. De-mould and let it stand for 28 days to obtain a modified concrete pavement with high anti-skid and wear resistance.

[0046] Example 2 A modified concrete highly anti-skid and wear-resistant pavement, which is cast by modified concrete; Modified concrete includes the following components: Water, cement, fly ash, fine aggregate, coarse aggregate, modified whiskers, admixtures.

[0047] The cement is ordinary Portland cement purchased from Runfeng Cement, standard: PO 42.5R.

[0048] The fly ash was purchased from Hebei Zongrun Mineral Products Co., Ltd., and it was secondary fly ash.

[0049] The fine aggregate was river sand, which was commercially available and had a mesh size of 20-40.

[0050] The coarse aggregate is basalt crushed stone, which is commercially available and has a particle size of 20-25 mm.

[0051] The admixture is a compound of water reducer and early strength agent.

[0052] The water reducer is polycarboxylic acid water reducer, which was purchased from Shandong Tenghua New Materials Co., Ltd.

[0053] The early strength agent is calcium formate, which was purchased from Jinan Yuanlian Chemical Co., Ltd.

[0054] The modified whiskers are obtained by modifying calcium carbonate whiskers with a modifying liquid, wherein the modifying liquid is a compound of a solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and beta-propiolactone.

[0055] Calcium carbonate whiskers were purchased from Shijiazhuang Mayue Building Materials Co., Ltd., 325 mesh.

[0056] The solvent was methanol, which was purchased from Shandong Chuangli New Materials Co., Ltd.

[0057] Bisphenol fluorene was purchased from Wuhan Jushun Chemical Co., Ltd.

[0058] 2,2'-Biphenyldicarboxylic acid was purchased from Wuhan Jushun Chemical Co., Ltd.

[0059] Glycidol was purchased from Hubei Kewode Chemical Co., Ltd.

[0060] β-Propiolactone was purchased from Wuhan Belleye Biopharmaceutical Technology Co., Ltd.

[0061] The preparation method of the modified whiskers is as follows: Step 1) 100 kg of solvent, 18 kg of bisphenol fluorene, 12 kg of 2,2'-biphenyldicarboxylic acid, 9 kg of glycidol, and 7 kg of β-propiolactone were added into a stirring tank at a speed of 40 r / min and stirred for 15 minutes to obtain a modified solution.

[0062] Step 2) 50 kg of calcium carbonate whiskers were added to the modification liquid, kept at a constant temperature of 55° C., and soaked for modification for 13 hours.

[0063] Step 3), filtering out the whiskers and drying them at 110° C. to obtain modified whiskers.

[0064] The preparation method of the modified concrete high anti-skid and wear-resistant pavement is as follows: Step 01), 235kg cement, 29kg fly ash, 475kg river sand, 625kg basalt crushed stone, 25kg modified whisker, 2.5kg polycarboxylate water reducer, and 2.5kg calcium formate are put into a stirring tank at a speed of 60r / min and stirred for 15min to mix evenly to obtain a premix.

[0065] Step 02), add 100kg of water to the premix, rotate at 120r / min, stir for 5min, mix evenly, and obtain modified concrete.

[0066] Step 03) Pour the modified concrete into the formwork and tamp it down. Scratch anti-skid grooves perpendicular to the length of the pavement on the concrete surface to form a rough surface. Sprinkle water and cure for 3 days. De-mould and let it stand for 28 days to obtain a modified concrete pavement with high anti-skid and wear resistance.

[0067] Example 3 A modified concrete highly anti-skid and wear-resistant pavement, which is cast by modified concrete; Modified concrete includes the following components: Water, cement, fly ash, fine aggregate, coarse aggregate, modified whiskers, admixtures.

[0068] The cement is ordinary Portland cement purchased from Runfeng Cement, standard: PO 42.5R.

[0069] The fly ash was purchased from Hebei Zongrun Mineral Products Co., Ltd., and it was secondary fly ash.

[0070] The fine aggregate was river sand, which was commercially available and had a mesh size of 20-40.

[0071] The coarse aggregate is basalt crushed stone, which is commercially available and has a particle size of 20-25 mm.

[0072] The admixture is a compound of water reducer and early strength agent.

[0073] The water reducer is polycarboxylic acid water reducer, which was purchased from Shandong Tenghua New Materials Co., Ltd.

[0074] The early strength agent is calcium formate, which was purchased from Jinan Yuanlian Chemical Co., Ltd.

[0075] The modified whiskers are obtained by modifying calcium carbonate whiskers with a modifying liquid, wherein the modifying liquid is a compound of a solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and beta-propiolactone.

[0076] Calcium carbonate whiskers were purchased from Shijiazhuang Mayue Building Materials Co., Ltd., 325 mesh.

[0077] The solvent was methanol, which was purchased from Shandong Chuangli New Materials Co., Ltd.

[0078] Bisphenol fluorene was purchased from Wuhan Jushun Chemical Co., Ltd.

[0079] 2,2'-Biphenyldicarboxylic acid was purchased from Wuhan Jushun Chemical Co., Ltd.

[0080] Glycidol was purchased from Hubei Kewode Chemical Co., Ltd.

[0081] β-Propiolactone was purchased from Wuhan Belleye Biopharmaceutical Technology Co., Ltd.

[0082] The preparation method of the modified whiskers is as follows: Step 1) 100 kg of solvent, 19 kg of bisphenol fluorene, 13 kg of 2,2'-biphenyldicarboxylic acid, 10 kg of glycidol, and 8 kg of β-propiolactone were added into a stirring tank at a speed of 40 r / min and stirred for 15 minutes to obtain a modified solution.

[0083] Step 2) 50 kg of calcium carbonate whiskers were added to the modified solution, kept at a constant temperature of 60° C., and immersed for 14 hours.

[0084] Step 3), filtering out the whiskers and drying them at 110° C. to obtain modified whiskers.

[0085] The preparation method of the modified concrete high anti-skid and wear-resistant pavement is as follows: Step 01), 240kg cement, 30kg fly ash, 480kg river sand, 630kg basalt gravel, 26kg modified whisker, 3kg polycarboxylate water reducer, and 3kg calcium formate are put into a stirring tank at a speed of 60r / min, stirred for 15min, and mixed evenly to obtain a premix.

[0086] Step 02), add 100kg of water to the premix, rotate at 120r / min, stir for 5min, mix evenly, and obtain modified concrete.

[0087] Step 03) Pour the modified concrete into the formwork and tamp it down. Scratch anti-skid grooves perpendicular to the length of the pavement on the concrete surface to form a rough surface. Sprinkle water and cure for 3 days. De-mould and let it stand for 28 days to obtain a modified concrete pavement with high anti-skid and wear resistance.

[0088] Comparative Example 1 A modified concrete highly anti-skid and wear-resistant pavement, which differs from Example 2 only in that: An equal amount of γ-methacryloxypropyltrimethoxysilane was used to replace bisphenol fluorene.

[0089] γ-Methacryloxypropyltrimethoxysilane was purchased from Dongguan Hongrui Chemical Co., Ltd.

[0090] Comparative Example 2 A modified concrete highly anti-skid and wear-resistant pavement, which differs from Example 2 only in that: 2,2'-biphenyldicarboxylic acid was replaced by an equal amount of 2-ethylhexyl acrylate.

[0091] Isooctyl acrylate was purchased from Shandong Chuangying Chemical Co., Ltd.

[0092] Comparative Example 3 A modified concrete highly anti-skid and wear-resistant pavement, which differs from Example 2 only in that: Glycidol was replaced by an equal amount of isobutyltriethoxysilane.

[0093] Isobutyltriethoxysilane was purchased from Qufu Yishun Chemical Co., Ltd.

[0094] Comparative Example 4 A modified concrete highly anti-skid and wear-resistant pavement, which differs from Example 2 only in that: β-propiolactone was replaced by an equal amount of tert-butylaminoethyl methacrylate.

[0095] Tert-butylaminoethyl methacrylate was purchased from Hubei Jiahui Xingcheng Biotechnology Co., Ltd.

[0096] Comparative Example 5 A modified concrete highly anti-skid and wear-resistant pavement, which differs from Example 2 only in that: An equal amount of γ-methacryloyloxypropyltrimethoxysilane was used to replace bisphenol fluorene, an equal amount of 2,2'-biphenyldicarboxylic acid was used to replace 2,2'-diphenyldicarboxylic acid, an equal amount of isobutyltriethoxysilane was used to replace glycidol, and an equal amount of tert-butylaminoethyl methacrylate was used to replace β-propiolactone.

[0097] γ-Methacryloxypropyltrimethoxysilane was purchased from Dongguan Hongrui Chemical Co., Ltd.

[0098] Isooctyl acrylate was purchased from Shandong Chuangying Chemical Co., Ltd.

[0099] Isobutyltriethoxysilane was purchased from Qufu Yishun Chemical Co., Ltd.

[0100] Tert-butylaminoethyl methacrylate was purchased from Hubei Jiahui Xingcheng Biotechnology Co., Ltd.

[0101] Comparative Example 6 A modified concrete highly anti-skid and wear-resistant pavement, which differs from Example 2 only in that: The modified whiskers were replaced by calcium carbonate whiskers in equal amounts.

[0102] Calcium carbonate whiskers were purchased from Shijiazhuang Mayue Building Materials Co., Ltd., 325 mesh.

[0103] Experiment 1 According to GB / T 16925-1997 "Test method for wear resistance of concrete and its products (ball bearing method)", the modified concrete prepared in each embodiment and comparative example was made into test samples, and the wear resistance of the test samples was tested.

[0104] The specific test data of Experiment 1 are shown in Table 1. wear resistance Example 1 10.2 Example 2 10.7 Example 3 10.9 Comparative Example 1 4.3 Comparative Example 2 4.9 Comparative Example 3 5.7 Comparative Example 4 5.1 Comparative Example 5 4.1

[0105] According to the data comparison of each embodiment and comparative example in Table 1, the wear resistance of each embodiment is significantly higher than that of each comparative example. It can be seen that comparative examples 1-5 add modified whiskers modified by other modifying liquids. Although compared with directly adding unmodified calcium carbonate whiskers (Comparative Example 6), the effect of improving the wear resistance is significantly worse than that of each embodiment. It can be seen that only after bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone are compounded into a modifying liquid, a significant modification effect can be achieved, thereby significantly improving the effect of the modified whiskers on improving the wear resistance of concrete.

[0106] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A modified concrete high-slip and wear-resistant pavement, characterized by: Made of modified concrete; The modified concrete comprises the following components in parts by mass: 100 parts water; 230-240 parts of cement; 28-30 parts of fly ash; 470-480 parts of fine aggregate; 620-630 parts of coarse aggregate; 24-26 parts of modified whiskers; 4-6 parts of admixture; The modified whiskers are obtained by modifying calcium carbonate whiskers with a modifying liquid; The modified liquid is a compound of a solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and beta-propiolactone.

2. The modified concrete highly anti-skid and wear-resistant pavement according to claim 1, characterized in that: The mass ratio of the bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and beta-propiolactone is 17-19:11-13:8-10:6-8.

3. The modified concrete highly anti-skid and wear-resistant pavement according to claim 2, characterized in that: The mass ratio of the solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol and beta-propiolactone is 100:17-19:11-13:8-10:6-8.

4. The modified concrete highly anti-skid and wear-resistant pavement according to claim 3, characterized in that: The solvent is methanol.

5. A modified concrete highly anti-skid and wear-resistant pavement according to any one of claims 1 to 4, characterized in that: The modification method of the modified whisker is as follows: Step 1) uniformly mixing the solvent, bisphenol fluorene, 2,2'-biphenyldicarboxylic acid, glycidol, and β-propiolactone to obtain a modified solution; Step 2) Place the calcium carbonate whiskers into the modified solution, maintain a constant temperature of 50-60°C, and soak for 12-14 hours; Step 3), filter out the whiskers, and dry them to obtain modified whiskers.

6. The modified concrete highly anti-skid and wear-resistant pavement according to claim 1, characterized in that: The admixture is a compound of a water reducing agent and an early strength agent.

7. The modified concrete highly anti-skid and wear-resistant pavement according to claim 6, characterized in that: The mass ratio of the water reducer to the early strength agent is 2-3:2-3.

8. A method for preparing a modified concrete highly anti-skid and wear-resistant pavement according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 01), cement, fly ash, fine aggregate, coarse aggregate, modified whiskers, and admixtures are uniformly mixed to obtain a premix; Step 02), add water to the premix and mix well to obtain modified concrete; Step 03) Pour the modified concrete into the formwork, roughen the concrete surface, perform curing, and demould to obtain a highly anti-skid and wear-resistant modified concrete pavement.