CN111395091A - On-site road mixing construction method for treating laterite granules by using large-thickness cement - Google Patents
On-site road mixing construction method for treating laterite granules by using large-thickness cement Download PDFInfo
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- CN111395091A CN111395091A CN202010231522.8A CN202010231522A CN111395091A CN 111395091 A CN111395091 A CN 111395091A CN 202010231522 A CN202010231522 A CN 202010231522A CN 111395091 A CN111395091 A CN 111395091A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
- E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Road Paving Structures (AREA)
- Road Paving Machines (AREA)
Abstract
The invention relates to a field road mixing construction method for treating laterite granules by using large-thickness cement. The cement treated laterite granules constructed by the method not only can realize large-scale construction, but also the cement treated laterite granule structural layer after construction has better integrity and compactness, and can provide feasible construction guidance for similar projects in African regions.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a field road mixing construction method for treating laterite granules by using large-thickness cement.
Background
Laterite granules are mainly distributed in african regions, and are widely applied to the field of local road engineering construction due to abundant reserves, certain bearing capacity after compaction and relatively low price. Wherein, the cement formed by adding 2 to 3 percent of cement and 6 to 8 percent of water into the laterite granules treats the laterite granules, and the laterite granules are mainly used as a roadbed improving layer between a soil base and a base layer in the African road surface engineering.
In recent years, the number of road infrastructure projects for enterprises in China to build Africa areas has increased. Due to the lack of basic research work, the highway construction of most countries in Africa does not have the national standard at present, the countries in the French speaking area of Africa have to directly take the French standard for pavement design and construction, and according to the requirements of French asphalt pavement structure design guidelines, the single-layer thickness of the cement treatment laterite granules used for a roadbed improvement layer is generally as follows: 15cm, 20cm, 25cm and 30 cm. However, from the material property, the cement treated laterite granules belong to cement stabilizing materials, the reasonable design thickness is generally 15-20cm, and once the thickness is more than 20cm, the cement treated laterite granules belong to a large-thickness cement stabilizing material structure layer, and the problems of material supply, paving and rolling of the large-thickness structure in continuous construction are particularly prominent. At present, a large-thickness cement stable material structural layer is mainly paved by using an anti-segregation high-power paver and rolled by using a large-tonnage large-exciting-force road roller so as to ensure the integrity and compactness of the structural layer. However, because the construction conditions in the African region fall behind and the special equipment is lacked, how to utilize the existing construction equipment to complete the construction operation of treating the laterite granules by the cement with large thickness, ensure the continuity of construction and achieve good implementation effect is a great problem in front of middle-aged enterprises.
Disclosure of Invention
Aiming at the problems, in order to ensure the continuity and large-scale construction operation of the large-thickness cement treatment laterite granules and obtain a road surface structure layer meeting the design requirement under the condition of lacking special equipment, the invention provides the field road-mixing large-thickness cement treatment laterite granule construction method. The cement treated laterite granules constructed by the method not only can realize large-scale construction, but also the cement treated laterite granule structural layer after construction has better integrity and compactness, and can provide feasible construction guidance for similar projects in African regions.
The invention provides a field road mixing construction method for treating laterite granules by using large-thickness cement, which comprises the following steps of: the construction processes of on-site mixing, paving, compacting, curing and the like comprise the following specific steps:
1) in situ blending
(1) Rolling the lower bearing layer for 1-2 times by using a steel wheel road roller, spraying water on a road section with preset stacking after leveling the surface to wet the surface,
(2) measuring the surface elevation H of the lower bearing layer1Steel templates with the thickness equal to the designed thickness h of the laterite granules for cement treatment are arranged on two sides of the construction section,
(3) calculating the mass of water, cement and laterite granules required by each square meter in a construction section according to the transverse width B, the longitudinal length L and the design thickness of the cement treatment laterite granule construction section and the density and the proportion among water, cement and laterite granules of the cement treatment laterite granules obtained by combining the design of the mix proportion,
(4) calculating the longitudinal length of each transport vehicle when the transport vehicle is filled with the laterite granules according to the mass of the laterite granules loaded by the transport vehicle and the transverse width of the construction section and the mass of the laterite granules required by each square meter, marking a longitudinal boundary on the surface of a lower bearing layer by adopting cement powder, unloading the laterite granules in the transport vehicle into a distribution grid formed between the longitudinal boundary and steel templates at two sides of the construction section in a one-time, uninterrupted and uniform manner,
(5) determining the longitudinal spacing and the transverse spacing for placing the bagged cement according to the mass of the cement required by each square meter and the mass of each bag of the bagged cement, opening the bags of the bagged cement and pouring the bagged cement onto the surface of a lower bearing layer,
(6) mixing the laterite granules and cement by a loader,
(7) sprinkling water by a sprinkling truck according to the water consumption required by each square meter,
(8) mixing the laterite granules, cement and water together by using a common land leveler;
2) paving machine
(a) Primarily leveling, a land leveler provided with a GPS elevation control system is adopted for primarily leveling, and the elevation H at the bottom of a land leveler cutting blade is primarily leveled by utilizing the GPS elevation control system connected to the land leveler cutting blade2Controlling the position to be higher than the surface elevation h ×α of the lower bearing layer, then primarily flattening the steel plate according to the procedures of flattening the steel plate for 1 time in the forward direction, raking the rake teeth for 1 time, and flattening the steel plate for 1 time in the forward direction,
(b) after the pre-pressing and the preliminary leveling are finished, the roller is rolled once by a single steel wheel roller,
(c) after the fine leveling prepressing is finished, a land leveler provided with a GPS (global positioning system) elevation control system is adopted for carrying out accurate leveling, and the elevation H at the bottom of a land leveler cutting blade is accurately leveled by utilizing the GPS elevation control system connected to the land leveler cutting blade3Controlling the position to be higher than the height h × (α +1)/2 of the surface of the lower bearing layer, and then accurately flattening the lower bearing layer according to the working procedures of flattening for 1 time in the forward direction, flattening for 1 time in the reverse direction and flattening for 1 time in the forward direction;
3) compacting
(A) Strongly vibrating and rolling the cement treated laterite granules for 4-6 times by using a single steel wheel road roller, walking the road roller from a side line to a central line direction,
(B) when the compactness meets the requirement, a land leveler provided with a GPS elevation control system is adopted for leveling, and the elevation H at the bottom of the land leveler cutting blade is leveled by utilizing the GPS elevation control system connected with the land leveler cutting blade4Is controlled to be higher than the surface elevation h of the lower bearing layer according toThe scraping treatment is carried out in the working procedures of 1 time of forward flattening and 1 time of reverse flattening,
(C) finally, a rubber-tyred roller is used for carrying out static pressure rolling for 2 times from the side line to the center line;
4) health preserving
And within 4 hours after the compaction is finished, spraying water to the cement treated laterite granules for curing and immediately covering by adopting geotextile. Then, spraying water for curing for 4-6 times every day until the upper layer material begins to be constructed.
Water in the step (3): cement: the ratio of the laterite granules was 6:3: 91.
And (3) in the step (8), the mixing mode is that forward walking and reverse rake tooth raking are used as a mixing cycle, and 4-6 cycles of mixing are preferably carried out until the laterite granules treated by cement have uniform properties and no obvious cement powder or water stain phenomenon exists.
The initial leveling in the step (a) is to start initial leveling when a 50m mixing section is completed in the road running direction.
The rolling in the step (b) is static pressure in forward and weak vibration in backward.
And after paving is completed for 50m, starting compaction operation.
The compactness meets the requirement that 3 positions are randomly selected for compactness detection, and the average value of the compactness at the 3 positions is greater than the design requirement, which indicates that the compactness meets the requirement.
The design requirement is 96% compaction.
And (C) after the single-drum road roller finishes rolling, detecting the compaction degree and recording, and carrying out the next step when the compaction degree meets the requirement, or else, increasing the rolling times of the single-drum road roller until the compaction degree meets the requirement.
The invention mainly utilizes the field road mixing to realize the continuity of material supply, utilizes the common land leveler to realize the field mixing, utilizes the land leveler provided with a GPS elevation system to realize the paving operation of the laterite granules treated by the cement with large thickness, utilizes the reasonable process combination of the steel wheel road roller and the rubber wheel road roller to realize the rolling of the structural layer with large thickness, can effectively solve the large-scale construction problem of the laterite granules treated by the cement with large thickness when special equipment is lacked, and the constructed structural layer has good integrity and compactness and has practical guiding significance for similar projects in African regions.
Detailed Description
The concrete implementation mode of the invention is illustrated by taking the construction of treating the laterite granules by cement on a certain highway of Senagal, one of the countries of the African French speaking region as an example.
The designed thickness h of the highway cement treated laterite granule is 25cm, the highway cement treated laterite granule belongs to a large-thickness cement treated laterite granule structure layer due to the fact that the thickness is larger than 20cm, the construction method disclosed by the invention is used in construction, and the specific steps are as follows.
1) In situ blending
(1) And (3) rolling the lower bearing layer for 1-2 times by using a steel wheel road roller, and spraying water on a road section with preset stacking after the surface is leveled to wet the surface.
(2) Measuring the surface elevation H of the lower bearing layer by adopting a leveling instrument1Is 1m, and steel templates with the thickness of 25cm are arranged on two sides of the construction section.
(3) The transverse width B of the construction section of cement treated laterite granules is 11.5m, the longitudinal length L is 50m, the designed thickness is 25cm, and the density of cement treated laterite granules obtained by designing the mixing ratio is 2.45g/cm3Water: cement: and the ratio of the laterite granules is 6:3:91, the water consumption required by each square meter in the construction section is calculated to be 36.8kg, the mass of the cement is 18.4kg, and the mass of the laterite granules is 557.4 kg.
(4) The weight of laterite granules loaded on each transport vehicle used in the engineering is 25t, the transverse width of each transport vehicle used in the engineering is 11.5m, and the weight of laterite granules required by each square meter is 557.4kg, so that the longitudinal length of each transport vehicle which can be stacked when being filled with laterite granules is 3.9m, and a longitudinal boundary is marked on the surface of a lower bearing layer by adopting cement powder. And (3) unloading the laterite granules in the transport vehicle into a distribution grid formed between the longitudinal boundary and steel templates on two sides of the construction section one time, uninterruptedly and uniformly.
(5) The bagged cement used in the engineering has the mass of 25kg per bag, the mass of 18.4kg per square meter and the transverse spacing of 1.15m, so that the longitudinal spacing of the bagged cement can be determined to be 1.18m, the bagged cement is placed according to the spacing, and the bagged cement is poured onto the surface of a lower bearing layer after opening the bag.
(6) The laterite granules and cement are mixed by a loader.
(7) The sprinkling amount of the sprinkler is set according to the water consumption of 36.8kg required by each square meter, and the sprinkler is adopted for sprinkling.
(8) Laterite granules, cement and water were mixed together using a conventional grader. When mixing, the forward walking and reverse harrowing is used as a mixing cycle, after 5 cycles of mixing, the cement treated laterite granules are found to have uniform properties and no obvious cement powder or water stain phenomenon, and the mixing process is completed.
2) Paving machine
(1) And (5) initially leveling. When the construction section of 50m mixing is completed along the road direction, a land leveler provided with a GPS elevation control system is adopted for primary flattening. When the leveling is carried out preliminarily, the elevation H at the bottom of the cutting blade of the land leveler is controlled by the GPS elevation control system connected to the cutting blade of the land leveler2Is controlled to be higher than the surface elevation of the lower bearing layer by 33cm, namely the elevation H of the bottom of the cutting blade of the land leveler at the moment2Is 1.33 m. And then, primarily flattening according to the procedures of flattening for 1 time in the forward direction, harrowing for 1 time by the rake teeth and flattening for 1 time in the forward direction.
(2) And (6) pre-pressing. And after the primary leveling is finished, rolling once by using a road roller. In rolling, static pressure is applied when the roller is moved forward, and weak vibration is applied when the roller is moved backward.
(3) And (4) refining and smoothing. And after the pre-pressing is finished, accurately flattening by adopting a land leveler provided with a GPS elevation control system. Accurately flattening, and utilizing a GPS elevation control system connected to the cutting blade of the land leveler to control the elevation H at the bottom of the cutting blade of the land leveler3Is controlled to be at a position 29cm higher than the surface elevation of the lower bearing layer, namely the elevation H of the bottom of the cutting blade of the land leveler at the moment3Is 1.29 m. And then, accurately flattening according to the procedures of flattening for 1 time in the forward direction, flattening for 1 time in the reverse direction and flattening for 1 time in the forward direction.
3) Compacting
After paving for 50m, starting compaction operation, and specifically comprising the following steps:
(1) and (3) strongly vibrating and rolling the cement treated laterite granules for 5 times by using a 25t single-steel-wheel road roller, wherein the road roller walks from a side line to a center line.
(2) After the single steel wheel road roller is rolled, randomly selecting 3 positions for carrying out compactness detection, wherein the average compactness value of the 3 positions is 98.2 percent and is more than 96 percent of the design requirement, and the compactness meets the requirement.
(3) Adopting a land leveler with a GPS elevation control system to carry out scraping treatment, and utilizing the GPS elevation control system connected with a cutting blade of the land leveler to control the elevation H at the bottom of the cutting blade of the land leveler4Controlling the height to be 25cm higher than the surface height of the lower bearing layer, namely controlling the height H of the bottom of the cutting blade of the land leveler at the moment4Is 1.25 m. And (4) carrying out leveling treatment according to the working procedures of leveling for 1 time in the forward direction and leveling for 1 time in the reverse direction.
(4) And finally, carrying out static pressure rolling on the surface from the side line to the center line for 2 times by using a rubber-tyred roller.
5) Health preserving
And within 4 hours after the compaction is finished, spraying water to the cement treated laterite granules for curing and immediately covering by adopting geotextile. And then, sprinkling water for curing for 4-6 times every day until the upper layer construction is started.
After the construction is finished, the detection shows that the average value of the compactness of the structural layer of the treated laterite aggregate of the highway cement can reach 97.9 percent, is greater than 96 percent of the design requirement value, and has better compactness. Through the core drilling detection, the thickness average value of the cement treated laterite granule structural layer is 25.2cm, the design thickness requirement is met, the bottom of the core sample is compact, no obvious honeycomb-shaped gap is seen, the integrity and the compactness are good, and the construction of the next procedure can be carried out. The highway applying the invention has good construction quality of the pavement structure layer, and obtains the best global project prize of highway class in 2019 of American Engineering News Record (ENR)2019 in 7 months in 2019. Therefore, the construction method can realize good construction effect, can solve the defect that the construction of the pavement structure layer with large thickness cannot be finished due to the lack of special equipment, can reduce the expense for purchasing special equipment, and is a construction process with better technical and economic properties.
The invention mainly utilizes the field road mixing to realize the continuity of material supply, utilizes the common land leveler to realize the field mixing, utilizes the land leveler provided with a GPS elevation system to realize the paving operation of the laterite granules treated by the cement with large thickness, utilizes the reasonable process combination of the steel wheel road roller and the rubber wheel road roller to realize the rolling of the structural layer with large thickness, can effectively solve the large-scale construction problem of the laterite granules treated by the cement with large thickness when special equipment is lacked, and the constructed structural layer has good integrity and compactness and has practical guiding significance for similar projects in African regions.
Claims (9)
1. A field road mixing construction method for treating laterite granules by using large-thickness cement comprises the following steps: the construction process comprises the following steps of field mixing, paving, compacting and health preserving:
1) in situ blending
(1) Rolling the lower bearing layer for 1-2 times by using a steel wheel road roller, spraying water on a road section with preset stacking after leveling the surface to wet the surface,
(2) measuring the surface elevation H of the lower bearing layer1Steel templates with the thickness equal to the designed thickness h of the laterite granules for cement treatment are arranged on two sides of the construction section,
(3) calculating the mass of water, cement and laterite granules required by each square meter in a construction section according to the transverse width B, the longitudinal length L and the design thickness of the cement treatment laterite granule construction section and the density and the proportion among water, cement and laterite granules of the cement treatment laterite granules obtained by combining the design of the mix proportion,
(4) calculating the longitudinal length of each transport vehicle when the transport vehicle is filled with the laterite granules according to the mass of the laterite granules loaded by the transport vehicle and the transverse width of the construction section and the mass of the laterite granules required by each square meter, marking a longitudinal boundary on the surface of a lower bearing layer by adopting cement powder, unloading the laterite granules in the transport vehicle into a distribution grid formed between the longitudinal boundary and steel templates at two sides of the construction section in a one-time, uninterrupted and uniform manner,
(5) determining the longitudinal spacing and the transverse spacing for placing the bagged cement according to the mass of the cement required by each square meter and the mass of each bag of the bagged cement, opening the bags of the bagged cement and pouring the bagged cement onto the surface of a lower bearing layer,
(6) mixing the laterite granules and cement by a loader,
(7) sprinkling water by a sprinkling truck according to the water consumption required by each square meter,
(8) mixing the laterite granules, cement and water together by using a common land leveler;
2) paving machine
(a) Primarily leveling, a land leveler provided with a GPS elevation control system is adopted for primarily leveling, and the elevation H at the bottom of a land leveler cutting blade is primarily leveled by utilizing the GPS elevation control system connected to the land leveler cutting blade2Controlling the position to be higher than the surface elevation h ×α of the lower bearing layer, then primarily flattening the steel plate according to the procedures of flattening the steel plate for 1 time in the forward direction, raking the rake teeth for 1 time, and flattening the steel plate for 1 time in the forward direction,
(b) after the pre-pressing and the preliminary leveling are finished, the roller is rolled once by a single steel wheel roller,
(c) after the fine leveling prepressing is finished, a land leveler provided with a GPS (global positioning system) elevation control system is adopted for carrying out accurate leveling, and the elevation H at the bottom of a land leveler cutting blade is accurately leveled by utilizing the GPS elevation control system connected to the land leveler cutting blade3Controlling the position to be higher than the height h × (α +1)/2 of the surface of the lower bearing layer, and then accurately flattening the lower bearing layer according to the working procedures of flattening for 1 time in the forward direction, flattening for 1 time in the reverse direction and flattening for 1 time in the forward direction;
3) compacting
The method comprises the following specific steps:
(A) strongly vibrating and rolling the cement treated laterite granules for 4-6 times by using a single steel wheel road roller, walking the road roller from a side line to a central line direction,
(B) when the compactness meets the requirement, a land leveler provided with a GPS elevation control system is adopted for leveling, and the elevation H at the bottom of the land leveler cutting blade is leveled by utilizing the GPS elevation control system connected with the land leveler cutting blade4The position higher than the surface elevation h of the lower bearing layer is controlled, the strickling treatment is carried out according to the working procedures of 1 time of forward leveling and 1 time of reverse leveling,
(C) finally, a rubber-tyred roller is used for carrying out static pressure rolling for 2 times from the side line to the center line;
4) health preserving
And within 4 hours after the compaction is finished, spraying water to the cement treated laterite granules for curing and immediately covering by adopting geotextile. Then, spraying water for curing for 4-6 times every day until the upper layer material begins to be constructed.
2. The construction method according to claim 1, wherein the water in the step (3): cement: the ratio of the laterite granules was 6:3: 91.
3. The construction method according to claim 1, wherein the mixing mode in the step (8) is that forward walking and reverse rake tooth scarification are used as one mixing cycle, and the mixing is preferably carried out for 4-6 cycles until the laterite granule treated by cement has uniform properties and no obvious cement powder or water stain phenomenon.
4. The construction method according to claim 1, wherein the initial leveling in the step (a) is started when a 50m mixing section is completed in a road-going direction.
5. The construction method according to claim 1, wherein the rolling in the step (b) is static pressure in forward direction and weak vibration in reverse direction.
6. The construction method according to claim 1, wherein 50m after paving is completed, the compaction operation is started.
7. The construction method according to claim 1, wherein the compactness meeting requirements is that 3 positions are randomly selected for compactness detection, and the average value of the compactness at the 3 positions is greater than the design requirement, which indicates that the compactness meets the requirements.
8. The construction method according to claim 7, wherein the design requirement of the degree of compaction is 96%.
9. The construction method according to claim 7, wherein after the single steel wheel roller compaction in step (A) is completed, the compaction degree is detected and recorded, and the next step is carried out when the compaction degree meets the requirement, otherwise, the rolling frequency of the single steel wheel roller is increased until the compaction degree meets the requirement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010231522.8A CN111395091A (en) | 2020-03-27 | 2020-03-27 | On-site road mixing construction method for treating laterite granules by using large-thickness cement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010231522.8A CN111395091A (en) | 2020-03-27 | 2020-03-27 | On-site road mixing construction method for treating laterite granules by using large-thickness cement |
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| CN111395091A true CN111395091A (en) | 2020-07-10 |
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| CN202010231522.8A Pending CN111395091A (en) | 2020-03-27 | 2020-03-27 | On-site road mixing construction method for treating laterite granules by using large-thickness cement |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2801882A1 (en) * | 1999-12-06 | 2001-06-08 | Colas Sa | Cement composition, for road construction, includes specified amount of additive based on chalk and/or calcium sulfate |
-
2020
- 2020-03-27 CN CN202010231522.8A patent/CN111395091A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2801882A1 (en) * | 1999-12-06 | 2001-06-08 | Colas Sa | Cement composition, for road construction, includes specified amount of additive based on chalk and/or calcium sulfate |
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| Title |
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| 张宇: "浅谈水泥改良土在路基工程中的应用", 《湖南交通科技》 * |
| 李善超: "非洲天然红土粒料改良与施工研究", 《现代交通技术》 * |
| 许志威: "平地机GPS自动测量控制系统在国外高速路施工中的应用初探", 《云南科技管理》 * |
| 韩作新: "《公路路基路面工程施工作业指导书》", 30 September 2017, 电子科学大学出版社 * |
| 黄小华等: "水泥稳定红土粒料在贝宁阿博公路项目中的应用研究 ", 《公路》 * |
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Application publication date: 20200710 |