阅读说明：本技术 一种定量评价沥青路面冷补料施工和易性的测试方法 (A kind of test method of quantitative assessment Bituminous Pavement Cold feed supplement construction workability ) 是由 不公告发明人 于 2018-05-22 设计创作，主要内容包括：本发明公开了一种定量评价沥青路面冷补料施工和易性的测试方法,属于道路工程测试技术领域。本发明测试方法具体为：对沥青黏度为0.28Pa.s时所对应的温度条件下的普通沥青AC-13混合料进行贯入试验,得到其15mm内的位移-力曲线,将该位移-力曲线作为标准曲线；对某种具体冷补料进行施工和易性评价时,在特定的温度条件下进行相同的贯入试验,得到其15mm范围内的位移-力曲线与标准曲线进行对比,若该曲线位于标准曲线下方,则该冷补料在该温度条件下具有良好的施工和易性,反之,施工和易性较差。相比现有采用目测法评价冷补料施工和易性的方法,本发明能够定量、准确、客观的评价冷补料施工和易性,且方法简单易行。(The invention discloses a kind of test methods of quantitative assessment Bituminous Pavement Cold feed supplement construction workability, belong to road engineering the field of test technology.Test method of the present invention specifically: plain asphalt AC-13 mixture when being 0.28Pa.s to pitch viscosity under the conditions of corresponding temperature carries out penetration test, the displacement-force curve in its 15mm is obtained, using the displacement-force curve as standard curve；When carrying out construction workability evaluation to certain specific cold-repairing material, identical penetration test is carried out under certain temperature conditions, the displacement-force curve obtained within the scope of its 15mm is compared with standard curve, if the curve is located at below standard curve, then the cold-repairing material has good construction workability under the conditions of the temperature, conversely, construction workability is poor.Compared to the existing method using ocular estimate evaluation cold-repairing material construction workability, the present invention can quantify, accurately, objective appraisal cold-repairing material construction workability, and method is simple and easy.)

1. a kind of quantitative evaluation method of cold-repairing material test low-temperature construction workability, it is characterised in that respectively to plain asphalt AC- Cold-repairing material under the conditions of 13 mixtures and certain temperature carries out penetration test, obtains the curve of the displacement-force within the scope of its 15mm, The superiority and inferiority of cold-repairing material construction workability is judged according to relative position locating for two displacement-force curves, if cold-repairing material displacement-force is bent Line is located at the lower section of plain asphalt AC-13 mixture, and then cold-repairing material has good construction workability under the conditions of the temperature, instead It, construction workability is poor.

2. test method as described in claim 1, which is characterized in that injection pressure head material is the cylindrical body of Q235 stainless steel, directly Diameter is 50mm.

3. test method as described in claim 1, which is characterized in that injection bucket is that internal diameter is 200mm, with a thickness of 5mm, is highly The Q235 stainless steel barrel of 200mm.

4. test method as described in claim 1, which is characterized in that when carrying out penetration test, thickness of the mixture in injection bucket Degree is 150mm.

5. test method as described in claim 1, which is characterized in that the speed of penetration test is 15mm/min.

6. test method as described in claim 1, which is characterized in that be displaced with plain asphalt AC-13 mixture injection as 15mm The force-displacement curve of range is as standard curve.

7. it is pitch that as claimed in claim 6, plain asphalt AC-13 mixture, which carries out the temperature of asphalt when penetration test, The viscosity temperature corresponding in 0.28Pa.s.

8. test method as described in claim 1, which is characterized in that power-displacement when injection 15mm same by cold-repairing material is bent Line differentiates the superiority and inferiority of its construction workability with relative position locating for standard curve.

Technical field

The present invention relates to civil engineering material the field of test technology, and in particular to a kind of test Bituminous Pavement Cold feed supplement construction The quantitative evaluation method of workability.

Background technique

Road surface pit slot is that one of the Major Diseases of China's bituminous pavement have and are gradually expanded if pit slot is repaired not in time Trend, finally result in pit slot area increase, pit slot internal water accumulation, when serious pit slot depth even can reach sub-surface, Security risk is caused to the traveling of vehicle.So when road surface generates pit slot, it is necessary to timely be repaired to pit slot.Drip The repairing of green road surface pit slot disease can be divided into the method for vulcanizing and cold-patch method two types according to the difference of repair technology.The former adopts heat Asphalt is mixed, some also locally heats former road surface, and the latter then uses room temperature asphalt material.Northern most of Regional winter and spring temperature are low, and comparatively laborious to pit slot progress repair procedure using method of vulcanizing at a lower temperature, operation is difficult Degree is big, and reason is mainly that hot-mix asphalt mixture used in hot mixing method has higher requirements in temperature in repairing, low Hot-mix asphalt mixture cooling is fast under the conditions of temperature, and quality is not easy to guarantee；And emergency first-aid repair is carried out to certain pit slots in the rainy day When, it is not available hot-mix asphalt mixture.Cold-repairing material speed of application when carrying out pavement patching is fast, easy to operate, not by weather It influences, environmental pollution degree is small.Therefore, it is with a wide range of applications using cold-repairing material repairing asphalt pavement pit disease.

And standardize at present it is relatively fewer to the performance requirements of cold-repairing material, wherein at this stage judge cold-repairing material construction and easily Property method be mainly ocular estimate: after being kept the temperature for 24 hours at a temperature of the good cold-repairing material of mixing is placed on -10 DEG C, laboratory technician observation it is cold Can feed supplement still maintain loose state, and with spades, the quality of its construction workability is judged in mix and not conglomeration easily. This method has obvious insufficient place: the subjective judgement according to people is evaluated, and the judgement of no standard measure leads to evaluation result Lack reliability, therefore, the construction workability for testing cold-repairing material needs to propose quantitative evaluation method.

Summary of the invention

Technical problem to be solved by the present invention lies in overcome the deficiencies of the prior art and provide a kind of Bituminous Pavement Cold feed supplement The evaluation method of construction workability, can quantify, accurately, objective appraisal cold-repairing material construction workability, and method is simple and easy.

The present invention specifically uses following technical scheme to solve above-mentioned technical problem:

A kind of test method of quantitative assessment cold-repairing material construction workability, by the good cold-repairing material of mixing be placed in injection bucket into Row penetration test obtains the curve of its displacement and power, at the same time, corresponding temperature condition when being 0.28Pa.s to pitch viscosity Under plain asphalt AC-13 asphalt carry out penetration test, the curve of its displacement-force is obtained, by the position within the scope of 15mm Shifting-force curve is as standard curve；When carrying out construction workability evaluation for certain specific cold-repairing material, in specific temperature condition It is lower to carry out identical penetration test, the curve of its displacement and power is obtained, by the displacement-force curve and standard song within the scope of its 15mm Line compares, if cold-repairing material has good construction workability under the conditions of the temperature, instead below standard curve It, construction workability is poor.

Preferably, injection pressure head material is the cylindrical body of Q235 stainless steel, diameter 50mm.

Preferably, it is 200mm that injection bucket, which is internal diameter, is highly the Q235 stainless steel barrel of 200mm with a thickness of 5mm.

Preferably, carry out penetration test when, mixture in injection bucket with a thickness of 150mm.

Preferably, the speed of penetration test is 15mm/min.

It preferably, is displacement-force curve within the scope of 15mm as standard using plain asphalt AC-13 mixture injection displacement Curve.

It is sticked it is further preferred that AC-13 asphalt carries out the temperature of asphalt when penetration test for the pitch Degree is the corresponding temperature of 0.28Pa.s.

Preferably, pass through the displacement-force curve and plain asphalt AC-13 mixture within the scope of cold-repairing material penetration test 15mm The resulting standard curve of penetration test compares the superiority and inferiority to differentiate its construction workability.

Present invention firstly provides a kind of test methods of quantitative assessment cold-repairing material construction workability.Compared with prior art, The invention has the following advantages:

The present invention can evaluate to accurate quantitative analysis cold-repairing material construction workability, and process is simple, and test result is reliably accurate.

Detailed description of the invention

Fig. 1 is penetration test schematic diagram

Fig. 2 is common AC-13 asphalt penetration test displacement-force curve graph under condition of different temperatures

Fig. 3 is cold-repairing material penetration test displacement-force curve graph under condition of different temperatures

Fig. 4 is the displacement-force canonical plotting of penetration test

Fig. 5 is cold-repairing material injection displacement-force curve and standard curve comparison diagram under condition of different temperatures

Specific embodiment

Technical solution of the present invention is described in detail with reference to the accompanying drawing:

In order to overcome the problems, such as that existing evaluation method is insecure without objectivity, test result, the present invention provides for the first time A kind of test method of quantitative assessment pitch cold-repairing material construction workability, the thinking of the invention are to use for reference the injection of asphalt The superiority and inferiority of cold-repairing material construction workability is evaluated in strength test by the displacement-force curve of injection same displacement.The experimental test Cold-repairing material be the loose condition (of surface) without overcompaction, can preferably reflect the initial shape when construction of this kind of mixture in this way State.

It specifically, is T DEG C of 0.28Pa.s corresponding temperature by its viscosity that the viscosity-temperature curve of pitch is looked into, mixing is good Plain asphalt AC-13 asphalt is set as keeping the temperature 2 hours in T DEG C of environmental cabinet in temperature, will be quantitative common after taking-up Bitumen A C-13 asphalt pours into injection cylinder, makes its surface evening, carries out penetration test, obtains the displacement-in its 15mm Force curve, using the displacement-force curve as standard curve；When carrying out construction workability evaluation for certain specific cold-repairing material, In Carry out identical penetration test under the conditions of specific temperature, obtain displacement-force curve within the scope of its 15mm and standard curve into Row comparison, if the curve is located at below standard curve, cold-repairing material has good construction workability under the conditions of the temperature, instead It, construction workability is poor.

In view of the maximum particle diameter of gathering materials of this cold-repairing material will affect injection curve if pressure head diameter is too small for 13mm Accuracy, therefore, it is suggested that indenter size is not less than 3 times of maximum particle diameter of gathering materials, it is specified that pressure head diameter is 5cm.

Influence in view of boundary to injection curve, therefore to minimize the influence on boundary, the diameter of injection cylinder is about 4 times of pressure head diameter, therefore provide that the diameter of injection cylinder is 20cm.

Pave actual conditions for true simulated roadway, the upper surface of road surface that cold-repairing material is usually repaired layer with a thickness of 4-5cm, And influence of the bottom surface boundary to injection curve is avoided, thickness of the cold-repairing material in injection cylinder is not preferably less than the practical thickness that paves in road surface 3 times of degree, therefore provide penetration test injection ladle mixing material with a thickness of 15cm.

Specific test device and the size of mixture thickness are as shown in Figure 1, include injection pressure head 1,2 and of injection bucket in figure Injection mixture 3.

Test object of the present invention is the mixture of granular media, and injection rate is too small, and to will lead to the testing time too long, thus because The cooling influence test result of hot-mix asphalt mixture determines pressure head of testing machine on the basis of comparative analysis in test process The speed of injection is set as 15mm/min.

China existing " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) regulation plain asphalt can be used glutinous Degree is the corresponding temperature of 0.28 ± 0.03Pa.s as mixture compacting temperature, i.e., mixture has well under the conditions of the temperature Construction workability, for this purpose, present invention provide that carry out AC-13 when pitch viscosity is 0.28Pa.s under the conditions of corresponding temperature common The displacement-force curve of asphalt penetration test is as standard song.

As shown in Figure 2 and Figure 3, it is either deposited between the injection function and temperature of plain asphalt AC-13 mixture or cold-repairing material In good correlation, the higher injection function of temperature is smaller, and construction workability is better, but in the injection later period, since test specimen temperature exists Variation in indoor environment causes the displacement-force curve of penetration test to be in nonlinear state, not can accurately reflect its construction Workability, for this purpose, the force-displacement curve that the present invention chooses in the 15mm under linear condition compares evaluation.

For the ease of public understanding, technical solution of the present invention is illustrated with specific embodiment below.

Test first obtains the penetration test curve of hot-mix asphalt mixture AC-13 as standard curve, specifically: foundation The viscosity-temperature curve of pitch, finding corresponding temperature when pitch viscosity is 0.28Pa.s is 120 DEG C, and the good hot asphalt of mixing is mixed It closes material AC-13 and injection bucket is placed in 120 DEG C of environmental cabinet and keeps the temperature 2h, then take out carry out penetration test.Penetration test Injection pressure head material used is the cylindrical body of Q235 stainless steel, diameter 50mm；Injection bucket is that internal diameter is 200mm, with a thickness of 5mm is highly the Q235 stainless steel barrel of 200mm；Carry out penetration test when, mixture in injection bucket with a thickness of 150mm；It passes through The speed for entering test is 15mm/min.Drawing displacement is the displacement-force curve of the penetration test in 15mm as standard curve, such as Shown in Fig. 4.

Then the cold-repairing material after mixing is kept the temperature into 2h under required environment temperature, injection is carried out using above-mentioned identical aspect Test, judges construction of this cold-repairing material under the conditions of temperature by the relativity of its displacement-force curve and standard curve Workability.

Certain cold-repairing material that the present embodiment distinguishes p- 5 DEG C and -10 DEG C has carried out penetration test, under the conditions of two kinds of temperature Penetration test curve and hot-mix asphalt mixture AC-13 penetration test determine standard curve compare, as shown in figure 5, It will be evident that comparison with standard curve, this cold-repairing material power needed for injection 15mm displacement under the conditions of -5 DEG C is smaller, constructs and easy Property it is preferable, and under the conditions of -10 DEG C injection 15mm be displaced needed for power it is bigger, construction workability is poor.

In conclusion the present invention does not need artificially to estimate its construction workability of the conglomeration state evaluation of cold-repairing material, test knot Fruit more objective reality, and testing differentia brought by cold-repairing material type difference can be effectively eliminated, test result is more acurrate, more has Conducive to the reasonable construction temperature range of the various cold-repairing materials of determination.