CN105198316A - Emulsified asphalt cement stabilized macadam - Google Patents
Emulsified asphalt cement stabilized macadam Download PDFInfo
- Publication number
- CN105198316A CN105198316A CN201510590525.XA CN201510590525A CN105198316A CN 105198316 A CN105198316 A CN 105198316A CN 201510590525 A CN201510590525 A CN 201510590525A CN 105198316 A CN105198316 A CN 105198316A
- Authority
- CN
- China
- Prior art keywords
- rubble
- emulsified bitumen
- water
- cement
- emulsified asphalt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention belongs to the technical field of road building materials and discloses emulsified asphalt cement stabilized macadam. The emulsified asphalt cement stabilized macadam is prepared from, by the weight ratio to macadam, 2-4 parts of mixed emulsified asphalt, 3.5-5.5 parts of mixed cement, 4.5-6.0 parts of water and 100 parts of macadam. The emulsified asphalt cement stabilized macadam has a hardness and softness feature and good water-damage-resistant performance, compared with common cement stabilized macadam, compression resistance and splitting strength of mixed materials are lowered, and flexural-tensile strength is approximate at the normal temperature of 20 DEG C and obviously improved at the low temperature of 5 DEG C. The dry shrinkage water-loss rate, dry shrinkage coefficient and dynamic modulus are lowered, and the limit strain capacity is increased; construction performance is excellent; compaction is easy, little segregation is generated, strength variability is small, and bad influences of delay forming and dry maintenance are weakened; the requirements for mechanical strength of pavement bases of high-grade highways and urban roads can be met, and base shrinkage cracks can be effectively reduced or prevented.
Description
Technical field
The present invention relates to a kind of emulsified bitumen concrete steady rubble, belong to pavement construction material technical field.
Background technology
Cement stabilized macadam base has intensity compared with the feature such as high, bearing capacity is large, anti-fatigue performance is good, adopt in a large number in China's pavement of road construction, according to statistics, China's recent two decades comes, and the ratio of newly-built high-grade highway and major urban arterial highway sub-surface and subbase employing cement stabilized macadam is up to more than 2/3.
The shortcoming of cement stabilized macadam base material is that non-deformability is low, fragility large, easily because dehydration drying shrinkage and temperature shrinkage produce crack.This crack can reflex to oil mat within the pavement usage phase, thus causes the structure use properties on road surface to worsen.How to control the cracking of cement stabilized macadam base material, ensure that its pavement performance is durable, stable, become current problem demanding prompt solution.
In recent years, domestic was improve cement stabilized macadam base pavement performance to have carried out large quantity research, and much research is conceived to set about improving its shrinkage from many-sides such as aggregate grading, cement content, water content, constructional methods; Some scholars by adding suitable additive in cement stabilized macadam, as: flyash, fiber, styrene-butadiene polymer etc. are with while reaching and reducing compound drying shrinkage, warm contracting amount, increase material flexibility and improve its Ultimate Tensile dependent variable, thus reduce the appearance in base-layer contraction crack and reflex to the probability of surface layer.
Emulsified bitumen has good application prospect as additive, the cement stabilized macadam of admixture emulsified bitumen has the advantages that to temper toughness with gentleness, dehydration shrinkage reduces, also cheap compared with polymkeric substance such as butadiene-styrene latexes in price, it is likely one of approach solving pavement structure reflection crack efficient and cost-effective.But at present to mechanical property, the systematic study of pavement performance shortage of emulsified bitumen concrete steady macadam base material, fail to reach real requirement.
Summary of the invention
The object of the invention is to provide a kind of emulsified bitumen concrete steady rubble, to reduce its drying shrinkage and warm contracting amount and to increase toughness, thus reducing and preventing the appearance of emulsified bitumen concrete steady crushed rock base course shrinkage crack, improving its use properties.
Object of the present invention can be achieved through the following technical solutions.
A kind of emulsified bitumen concrete steady rubble, described material is made up of emulsified bitumen, cement, rubble and water, by and rubble mass ratio range, its composition and content as follows:
Rubble 100
Emulsified bitumen 2 ~ 4
Cement 3.5 ~ 5.5,
Water 4.5 ~ 6.0.
In the present invention, described rubble is made up of third gear (15-25mm, 5-15mm, 0-6mm) coarse aggregate and sand, and grating is compact-type grating.
In the present invention, described emulsified bitumen is that positively charged ion splits type emulsified bitumen slowly, and asphalt content is not less than 50%.
In the present invention, described cement is P.O.42.5 ordinary Portland cement.
In the present invention, described water is clean tap water, and its consumption is determined by compound maximum dry density under heavy compacting condition, and the weight of water accounts for 4.5 ~ 6.0% of rubble gross weight.
The preparation method of the emulsified bitumen concrete steady rubble that the present invention proposes, concrete steps are as follows:
After raw material is weighed according to proportioning, mix, in compound, add water, and be uniformly mixed and obtain roadbed material.
Beneficial effect of the present invention is:
1), under heavy compaction condition, the optimum moisture content of described emulsified bitumen concrete steady rubble reduces about 1% compared with the optimum moisture content of the Portland cement stabilization gravel of comparative group, and maximum dry density reduces by 1 ~ 4%.
2) the emulsified bitumen concrete steady rubble described in is compared with the Portland cement stabilization gravel of comparative group, and resistance to compression, the cleavage strength of compound decline; Flexural tensile strength time normal temperature (20 DEG C) is close, rises about 20 ~ 30% time low temperature (5 DEG C); The curved Compressive Strength of compound is than obviously rising, and time normal temperature (20 DEG C), during emulsified bitumen volume 2%, rise 0.05 ~ 0.07 point, during emulsified bitumen volume 4%, rises more than one times, reach about 0.5.
3) the emulsified bitumen stabilization gravel described in has good water stability, and after immersion, its intensity is almost constant.Care environments is less with the shaping impact on emulsified bitumen stabilization gravel intensity of delay, and strength degradation amplitude reduces 1/3 ~ 1/2 compared with the fall of the Portland cement stabilization gravel of comparative group.
4) the emulsified bitumen concrete steady rubble described in is compared with the Portland cement stabilization gravel of comparative group, and the strain of the drying shrinkage of compound, drying shrinkage percentage of water loss and the coefficient of shrinkage all obviously decline.Under normal curing condition, the drying shrinkage strain of emulsified bitumen concrete steady rubble decreases 1/5 ~ 1/3; Under natural-dehydration state, drying shrinkage strain minimizing 1/4 ~ 1/2.
5) the emulsified bitumen concrete steady rubble described in is compared with the Portland cement stabilization gravel of comparative group, and mixture warm shrinkage strain, temperature contracting coefficient have a little decline, but slippage is little; Under compound scour resistance and stress loading pattern, fatigue property is close.
6) the emulsified bitumen concrete steady rubble described in has certain toughness, draws in 4 experimental tests normal temperature is curved, and compared with the Portland cement stabilization gravel of comparative group, limiting flexibility and deformation work increase by 20% ~ 40%; When 5 DEG C, when dynamic modulus reduces by 10% ~ 17%, 20 DEG C, dynamic modulus reduces by 20% ~ 32%; When 40 DEG C, dynamic modulus reduces by 1/3 ~ 1/2.
7) emulsified bitumen concrete steady rubble of the present invention has good application property, wherein, mixing machinery need increase emulsified bitumen hold-up vessel and have under meter transfer lime, mixing time increases by 10 ~ 15s, pave, compaction process is identical with Portland cement stabilization gravel, on-the-spot segregation phenomenon reduces, under identical Compaction Effort, the compactness of emulsified bitumen concrete steady rubble is slightly high, and the homogeneity of its intensity, modulus and compactness is more excellent.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and in proportioning, the content of various material is according to the mass ratio range with rubble.
Embodiment 1:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 3.5; Emulsified bitumen: 2.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 4.9% of rubble weight.Its performance index are in Table 1-table 2.
Embodiment 2:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 3.5; Emulsified bitumen: 4.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 4.7% of rubble weight.Its performance index are in Table 1-table 2.
Embodiment 3:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 4.5; Emulsified bitumen: 2.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 5.0% of rubble weight.Its performance index are in Table 1-table 6.
Embodiment 4:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 4.5; Emulsified bitumen: 4.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 4.9% of rubble weight.Its performance index are in Table 1-table 5.
Embodiment 5:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 5.5; Emulsified bitumen: 2.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 5.2% of rubble weight.Its performance index are in Table 1-table 2.
Embodiment 6:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 5.5; Emulsified bitumen: 4.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 5.0% of rubble weight.Its performance index are in Table 1-table 2.
Comparative example 1:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 3.5.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 5.5% of rubble weight.Its performance index are in Table 1-table 2.
Comparative example 2:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 4.5.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 5.6% of rubble weight.Its performance index are in Table 1-table 5.
Comparative example 3:
Compound is made up of (mass ratio range) following raw material:
Rubble: 100; Cement: 5.5.After being weighed according to said ratio by raw material, in compound, add water, and be uniformly mixed and obtain roadbed material, wherein the add-on of water is 5.8% of rubble weight.Its performance index are in Table 1-table 2.
During use, by embodiment 1 ~ 6, the roadbed material prepared after comparative example 1 ~ 3 mix paves on the roadbed of construction equably, rolls compacting by job specifications rolling machine.
Table 1 compaction test and unconfined compressive strenght test result
The test of table 2 cleavage strength and flexural tensile strength test-results
Table 3 part case expands unconfined compressive strenght test result
Table 4 part case expands flexural tensile strength test-results
Table 5 part case shrinkage test-results
Table 6 part case experiment on fatigue properties result
Can be seen by table 1 and table 2, compare six embodiments and three comparative examples, along with emulsified bitumen volume increases, resistance to compression, the cleavage strength of embodiment decline, and fall increases to some extent along with cement dose increases, and slows down to some extent along with the increase in the length of time; The fall of embodiment cleavage strength is less than the fall of ultimate compression strength; The flexural tensile strength impact of volume on embodiment of emulsified bitumen is very micro-at normal temperatures.In table, each embodiment all reaches the requirement to super highway and Class I highway basic unit in " highway road surface construction technique normalizing " (JTJ034-2000).
Can be seen by table 3 and table 4, by embodiment 3,4 and comparative example 2 carry out contrast find, embodiment has good water stability, immersion after its intensity almost constant; Embodiment is less by postponing shaping impact; Along with the increase of emulsified bitumen volume, care environments reduces the intensity effect of embodiment; Embodiment has certain temperature sensibility, and its ultimate compression strength rises along with temperature and declines; During low temperature, emulsified bitumen can significantly improve the flexural tensile strength of embodiment, has even exceeded comparative example.
Can be seen by table 5, by embodiment 3,4 and comparative example 2 carry out contrast and find, the strain of the drying shrinkage of embodiment, drying shrinkage percentage of water loss and the coefficient of shrinkage obviously reduce, but little on temperature contraction performance impact; Can be seen by table 6, embodiment fatigue lifetime outline higher than comparative example.
For solution traditional cements stabilization gravel, the present invention easily occurs that the phenomenon of shrinkage crack has great help, by adding emulsified bitumen to reduce its drying shrinkage and warm contracting amount and to increase toughness in compound, thus reduce and prevent the appearance in base-layer contraction crack, improve the use properties of pavement structure.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the content disclosed in this embodiment.The equivalence completed under not departing from spirit disclosed in this invention so every or amendment, all fall into the scope of protection of the invention.
Claims (5)
1. an emulsified bitumen concrete steady rubble, is characterized in that described material is made up of emulsified bitumen, cement, rubble and water, by and rubble mass ratio range, its composition and content as follows:
Rubble 100
Emulsified bitumen 2 ~ 4
Cement 3.5 ~ 5.5,
Water 4.5 ~ 6.0.
2. emulsified bitumen concrete steady rubble according to claim 1, is characterized in that: described rubble is made up of third gear (15-25mm, 5-15mm, 0-6mm) coarse aggregate and sand, and grating is compact-type grating.
3. emulsified bitumen concrete steady rubble according to claim 1, is characterized in that: described emulsified bitumen is that positively charged ion splits type emulsified bitumen slowly, and asphalt content is not less than 50%.
4. emulsified bitumen concrete steady rubble according to claim 1, is characterized in that: described cement is P.O.42.5 ordinary Portland cement.
5. emulsified bitumen concrete steady rubble according to claim 1, is characterized in that: described water is clean tap water, and its consumption is determined by compound maximum dry density under heavy compacting condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510590525.XA CN105198316A (en) | 2015-09-17 | 2015-09-17 | Emulsified asphalt cement stabilized macadam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510590525.XA CN105198316A (en) | 2015-09-17 | 2015-09-17 | Emulsified asphalt cement stabilized macadam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105198316A true CN105198316A (en) | 2015-12-30 |
Family
ID=54946344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510590525.XA Pending CN105198316A (en) | 2015-09-17 | 2015-09-17 | Emulsified asphalt cement stabilized macadam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105198316A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495586A (en) * | 2016-10-26 | 2017-03-15 | 重庆绿恒环保科技有限公司 | A kind of emulsified asphalt modification pervious concrete |
| CN107285694A (en) * | 2017-05-23 | 2017-10-24 | 山东省交通科学研究院 | A kind of method of utilization emulsified asphalt composite curing slity soil |
| CN110184877A (en) * | 2019-05-31 | 2019-08-30 | 湖北工业大学 | A kind of sponge urban ecology processing roadnet and its construction method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323512A (en) * | 2008-07-10 | 2008-12-17 | 安徽省公路管理局 | Method for avoiding asphalt pavement reflection crack |
-
2015
- 2015-09-17 CN CN201510590525.XA patent/CN105198316A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323512A (en) * | 2008-07-10 | 2008-12-17 | 安徽省公路管理局 | Method for avoiding asphalt pavement reflection crack |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495586A (en) * | 2016-10-26 | 2017-03-15 | 重庆绿恒环保科技有限公司 | A kind of emulsified asphalt modification pervious concrete |
| CN107285694A (en) * | 2017-05-23 | 2017-10-24 | 山东省交通科学研究院 | A kind of method of utilization emulsified asphalt composite curing slity soil |
| CN110184877A (en) * | 2019-05-31 | 2019-08-30 | 湖北工业大学 | A kind of sponge urban ecology processing roadnet and its construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103866667B (en) | Half flexible Supporting Load Pavement paving structure | |
| CN102491703B (en) | Steel slag and cement stabilized base material | |
| Grilli et al. | Experimental investigation on fibre-reinforced cement-treated materials using reclaimed asphalt | |
| Baghini et al. | Evaluation of cement-treated mixtures with slow setting bitumen emulsion as base course material for road pavements | |
| CN103215875B (en) | A kind of anti-fatigue asphalt pavement based on differential settlement | |
| Xue et al. | Evaluation of pavement straw composite fiber on SMA pavement performances | |
| Aryal et al. | Long-term durability of ordinary Portland cement and polypropylene fibre stabilized kaolin soil using wetting–drying and freezing–thawing test | |
| Akkaya et al. | Experimental investigation of the use of pervious concrete on high volume roads | |
| CN105198316A (en) | Emulsified asphalt cement stabilized macadam | |
| Buritatum et al. | Improvement of tensile properties of cement-stabilized soil using natural rubber latex | |
| Gong et al. | Investigation on the impacts of gradation type and compaction level on the pavement performance of semi-flexible pavement mixture | |
| CN104597226A (en) | Determination method for levels of three factors in rubber powder modified cement stabilized crushed stone mixture | |
| Baghini et al. | Measuring the effects of styrene butadiene copolymer latex-Portland cement additives on properties of stabilized soil-aggregate base | |
| CN112553994A (en) | Composite pavement road with asphalt layer coated on sisal fiber cement-based composite material | |
| CN103613331B (en) | One road high-ductility lower shrinkage Emulsified Asphalt Mixture and preparation method | |
| Yu et al. | Study on the performance of emulsified asphalt recycled subgrade based on the evaluation of semi-rigid milling material | |
| CN108439906A (en) | A kind of high tenacity lacks the design method of muscle cement base rubber concrete | |
| Zhang et al. | Material innovation preparation and performance study of semi-flexible pavement materials | |
| Buritatum et al. | Improved Fatigue Performance and Cost-Effectiveness of Natural Rubber Latex–Modified Cement-Stabilized Pavement Base at Raised Temperatures | |
| CN114182595A (en) | Construction method of long-life asphalt road | |
| Mahrez et al. | Rutting characteristics of bituminous mixes reinforced with glass fiber | |
| CN109516736A (en) | A kind of temperature shrinkage active control type cement stabilized macadam and preparation method thereof | |
| CN106927730B (en) | A kind of LSAM | |
| CN203960702U (en) | A kind of semi-rigid asphalt pavement structure | |
| Taghipoor et al. | Investigation of material composition, design, and performance of open-graded asphalt mixtures for semi-flexible pavement: A comprehensive experimental study |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151230 |
|
| WD01 | Invention patent application deemed withdrawn after publication |