Unlock instant, AI-driven research and patent intelligence for your innovation.

SMA mixture and its preparation method and construction method

A construction method and technology of mixing materials, which are applied in the directions of buildings, roads, and coagulating pavements laid on site, can solve the problems of unstable quality of SMA mixture, hindering the large-scale application of SMA, and uneven distribution of fiber agglomeration. The effect of simplifying the mixing production process, reducing the emission of asphalt smoke and improving the economy

Inactive Publication Date: 2016-11-09
HEBEI PROVINCIAL COMM PLANNING & DESIGN INST
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned analysis, the present invention aims to provide a kind of SMA mixture, preparation method and construction method, do not add fiber in this SMA mixture, solve the fiber quality unevenness in the existing SMA mixture, fiber knot in the mixture The quality of the SMA mixture caused by uneven distribution of clusters is unstable, and the uneconomical and environmental problems caused by high construction requirements hinder the large-scale application of SMA.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • SMA mixture and its preparation method and construction method
  • SMA mixture and its preparation method and construction method
  • SMA mixture and its preparation method and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The embodiment of the present invention provides a kind of SMA mixture, comprises: the SBS modified asphalt (I-D) of 1 weight part, the aggregate of 16.07 weight parts (asphalt ratio=SBS modified asphalt / (aggregate+limestone mineral powder)=5.6 %), 1.79 parts by weight of mineral powder and 0.005 parts by weight of Evotherm M1 surfactant; wherein the aggregate is taken from basalt produced in Chengde, Hebei, and the gradation is shown in Table 4.

[0053]The preparation method of described SMA mixture, comprises the following steps:

[0054] Step 1: take a certain amount of SBS modified asphalt, take by weighing 0.5% surfactant with the weighed amount of the SBS modified asphalt (I-D), join in the described SBS modified asphalt and stir for 5min, then place Dry in an oven at 165°C for later use;

[0055] Step 2: Weigh the aggregate that is 16.07 times the weighted amount of the SBS modified asphalt described in step 1, keep the temperature in a drying oven at 155°C for...

Embodiment 2

[0068] The embodiment of the present invention provides a kind of SMA mixture, comprises: the SBS modified asphalt (I-D) of 1 weight part, the aggregate of 16.43 weight parts (asphalt ratio=SBS modified asphalt / (aggregate+limestone mineral powder)=5.6 %), 1.43 parts by weight of mineral powder and 0.006 parts by weight of Evotherm M1 surfactant; wherein the aggregate is taken from Shandong basalt, and the gradation is shown in Table 4.

[0069] The preparation method of described SMA mixture, comprises the following steps:

[0070] Step 1: take a certain amount of SBS modified asphalt, take by weighing 0.6% surfactant with the weighed amount of the SBS modified asphalt (I-D), join in the described SBS modified asphalt and stir for 10min, then place Dry in an oven at 155°C for later use;

[0071] Step 2: Weigh the aggregate (asphalt ratio is 5.6%) that is 16.43 times the amount of SBS modified asphalt in step 1, and keep the temperature in a drying oven at 145°C for 4h, and th...

Embodiment 3

[0076] The embodiment of the present invention provides a kind of SMA mixture on-site mixing and construction method, comprising: 1 weight part of SBS modified asphalt (I-D), 15.43 weight parts of aggregate (asphalt ratio=SBS modified asphalt / (aggregate+ Limestone mineral powder)=5.7%), 2.11 parts by weight of mineral powder and 0.005-0.006 parts by weight of surfactant; wherein the aggregate is taken from basalt produced in Shandong, and the gradation is shown in Table 4.

[0077] The preparation method of described SMA mixture is exampled with the production of mixture in on-site mixing building, comprising the following steps:

[0078] Step 1: Take 0.5%-0.6% surfactant of the mass of SBS modified asphalt and add it into the asphalt tank and stir for later use;

[0079] Step 2: Weigh the aggregate (the ratio of asphalt is 5.7%) to 15.43 times that of the SBS modified asphalt in step 1, heat it to 145-155°C, and add it to the mixing building for dry mixing;

[0080] Step 3: ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a SMA mixture and its preparation method and construction method. The SMA mixture comprises, by weight, 1 part of SBS-modified asphalt, 13-19 parts of aggregates, 1.2-2.4 parts of limestone ore powder and 0.005-0.006 parts of a surfactant. The preparation method comprises adding the surfactant into the SBS-modified asphalt, keeping the temperature of the mixture for next use, drying the aggregates, putting the dried aggregates into a stirring pot, adding the asphalt and ore powder into the stirring pot and carrying out stirring. The SMA mixture does not contain fibers and improves mixture stability, construction economy and environmental friendliness, and production efficiency.

Description

technical field [0001] The invention relates to the technical field of road and bridge engineering, in particular to an SMA mixture, a preparation method and a construction method. Background technique [0002] As a high-performance asphalt pavement material, SMA (asphalt mastic macadam mixture) is widely used at home and abroad based on its excellent anti-skid performance, high anti-rutting performance and durability. The traditional SMA mixture is a kind of asphalt mixture composed of asphalt, fiber stabilizer, mineral powder and a small amount of fine aggregate, which fills the skeleton gap of the discontinuously graded coarse aggregate with asphalt mastic. The primary function of fibers in SMA is to absorb and stabilize asphalt, which can reduce the dripping, leaking, and loss of asphalt binder during the mixing, transportation, and paving of SMA asphalt mixture, thereby avoiding the mixing of high asphalt content The material produces segregation and oil flooding, so t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B26/26E01C7/26E01C7/22
CPCC04B26/26E01C7/22E01C7/26C04B14/02C04B14/28
Inventor 王庆凯张卫焦彦利王笑森高占华高海涛严华崔武军
Owner HEBEI PROVINCIAL COMM PLANNING & DESIGN INST