scholarly journals Study on Mixture Ratio Design Method of AC-20C Modified Foamed Asphalt Mixture

2017 ◽  
Author(s):  
Kejia Liu ◽  
Bin Liang
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Mixture Ratio ◽  
Foamed Asphalt ◽  
Mixture Ratio Design

scholarly journals Design Method for Proportion of Cement-Foamed Asphalt Cold Recycled Mixture

2018 ◽  
Vol 142 ◽  
pp. 02002
Author(s):  
Junxiao Li ◽  
Wei Fu ◽  
Hechao Zang
Keyword(s):  
Water Consumption ◽  
Design Method ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
Water Stability ◽  
Fine Aggregate ◽  
Foamed Asphalt ◽  
Stability Experiment ◽  
Foaming Temperature ◽  
Temperature Water

Through foaming experiment of Zhongtai AH-70 asphalt, the best foaming temperature water consumption and influence factors of foamed asphalt’s foaming features are determined; By designing the proportion of foamed asphalt cold in-place recycled mixture combined with the water stability experiment, for this mixture the best foamed asphalt addition is 3%, and proportion of the mixture is RAP: fine aggregate: cement=75:23:2. Using SEM technology, the mechanism of increasing on the intensity of foamed asphalt mixture resulted by the addition of cement was analysed. This research provides reference for cement admixture’s formulation in the designing of foamed asphalt cold in-place recycled mixture.

Preparation and Mixture Ratio Design of Foam Concrete with Lightweight Tailings

2014 ◽  
Vol 665 ◽  
pp. 172-178
Author(s):  
Hong Gen Qin ◽  
Shuai Shuai Geng ◽  
Chao Ming Pang ◽  
You Hua Tao
Keyword(s):  
Water Absorption ◽  
Design Method ◽  
Research Needs ◽  
Foam Concrete ◽  
Preparation Technology ◽  
Mixture Ratio ◽  
Foaming Agent ◽  
Foam Stabilizer ◽  
Additional Water ◽  
Mixture Ratio Design

In this paper, the preparation technology and improved the mixture ratio design method of foam concrete with lightweight tailings have been studied. Based on the review, the following research needs have been identified: (i) to calculate the amount of lightweight tailings by the binder materials content, (ii) to calculate additional water by the water absorption of lightweight tailings saturated surface dry condition, (iii) to calculate foam stabilizer content by the weight of foaming agent. Foam should be measured by volume. By testing the wet density of foam concrete paste to accurately control the amount of foam. The foam concrete mixed with a certain amount of lightweight tailings not only can significantly reduce the content of cement, reduce cost, but also can improve the performance of foam concrete.

Experimental Study on Mix Ratio Design and Road Performance of Medium and Small Deformation Seamless Expansion Joints of Bridges

2021 ◽  
pp. 036119812098474
Author(s):  
Pengzhen Lu ◽  
Chenhao Zhou ◽  
Simin Huang ◽  
Yang Shen ◽  
Yilong Pan
Keyword(s):  
Traffic Safety ◽  
Performance Test ◽  
Asphalt Mixture ◽  
Small Deformation ◽  
Expansion Joint ◽  
Expansion Joints ◽  
Mixture Ratio ◽  
The Road ◽  
Marshall Test ◽  
Road Performance

Expansion joints are a weak and fragile part of bridge superstructure. The damage or failure of the expansion joint will lead to the decline of bridge durability and endanger the bridge structure and traffic safety. To improve the service life and performance of bridge expansion joints, the ideal method is to use seamless expansion joints. In this study, starting from the commonly used asphalt mixture gradation of seamless expansion joint, and taking into account the actual situation of bridge expansion joint structure and environment in China, the gradation and asphalt-aggregate ratio are preliminarily designed. Through a Marshall test, the corresponding asphalt mixture is evaluated and analyzed according to the stability, flow value, and void ratio, and the optimal gradation and asphalt-aggregate ratio are determined. Finally, the asphalt mixture is prepared with the mixture ratio design, and the test results of an immersion Marshall test, fatigue performance test, and full-scale test verify that the asphalt mixture meets the road performance requirements of seamless expansion joints. On the basis of the experimental data, the performance of large sample asphalt mixture is continuously tested, compared, and optimized. The results show that the asphalt mixture ratio designed is true and reliable, which can provide reference for the optimal design of seamless expansion joint filler.

scholarly journals Research on Improving the Durability of Bridge Pavement Using a High-Modulus Asphalt Mixture

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1449
Author(s):  
Wenfeng Wang ◽  
Shaochan Duan ◽  
Haoran Zhu
Keyword(s):  
Construction Industry ◽  
Mechanical Response ◽  
Design Method ◽  
Asphalt Mixture ◽  
Field Tests ◽  
Bottom Layer ◽  
High Modulus ◽  
Practical Applications ◽  
Depth Prediction ◽  
Pavement Structure

In order to improve the durability of the asphalt pavement on a cement concrete bridge, this study investigated the effect of the modulus of the asphalt mixture at the bottom layer on the mechanical response of bridge pavement, along with a type of emerging bridge pavement structure. In addition, the design method and pavement performance of a high-modulus asphalt mixture were investigated using laboratory and field tests, and the life expectancy of the deck pavement structure was predicted based on the rutting deformation. The results showed that the application of a high-modulus asphalt mixture as the bottom asphalt layer decreased the stress level of the pavement structure. The new high-modulus asphalt mixture displayed excellent comprehensive performance, i.e., the dynamic stability reached 9632 times/mm and the fatigue life reached 1.65 million cycles. Based on the rutting depth prediction, using high-modulus mixtures for the bridge pavement prolonged the service life from the original 5 years to 10 years, which significantly enhanced the durability of the pavement structure. These research results could be of potential interest for practical applications in the construction industry.

Mixture Ratio Design of Inorganic Polymer Concrete and the Study of Expansive Performance

2013 ◽  
Vol 357-360 ◽  
pp. 1142-1147 ◽  
Author(s):  
Li Ming Yu ◽  
Zhe An Lu ◽  
Xiao Hui Yuan ◽  
Hui Guo Chen
Keyword(s):  
Volume Growth ◽  
Inorganic Polymer ◽  
Polymer Concrete ◽  
Material Strength ◽  
Mixture Ratio ◽  
Engineering Research ◽  
Expansive Agent ◽  
New Material ◽  
Dry Shrinkage ◽  
Mixture Ratio Design

norganic polymer concrete of a new environment-friendly material has been the hot issue in engineering research so far. For this new material, the main job of the paper includes: we design mixture ratios of inorganic polymer concrete by ourselves, testing the concrete in the age periods of 3, 7, 28 d. The results indicate that this kind of material strength develops mainly in the first 3 d, the strength grows slowly in the later stage; the dry shrinkage of the configured concrete properties are measured, the curve of dry shrinkage shows that the dry shrinkage occurs mainly in the first 14 d and develops slowly in the late; And measure the expansion performance of the concrete member mixed the different categories expansive agent, the results show that the volume growth of mortar specimens to join HCSA expansion agent are obvious; Test results provide a certain basis for the inorganic polymer concrete of micro expansion.

The Study on Foaming Characteristics of Foamed Asphalt in Cold Recycling Technology

2011 ◽  
Vol 243-249 ◽  
pp. 4293-4296
Author(s):  
Jing Li Liu ◽  
Lian Yu Wei ◽  
Guo Qiang Zhang
Keyword(s):  
Quality Control ◽  
Theoretical Basis ◽  
Asphalt Mixture ◽  
Construction Process ◽  
Environment Protection ◽  
Effect Evaluation ◽  
Construction Period ◽  
Foamed Asphalt ◽  
Recycling Technology ◽  
Cold Recycling

Through the foaming mechanism and foaming effect evaluation, this paper analyzes the production procedure, optimum content and strength of foamed asphalt mixture thoroughly. Combined with the construction process quality control and inspection and acceptance criteria, this paper provides data for reference and theoretical basis for application of cold recycled technology of foamed asphalt to pavement project. Its construction without disrupting traffic, thus shorten the construction period and improve efficiency, which also have advantages such as energy conservation, environment protection and economy. Above all, it is beneficial to foamed asphalt′s popularization and application.

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