Study on the Influence of Coarse Aggregate on the Pavement Performance of Road Cement Concrete

ICCTP 2009 ◽  
2009 ◽  
Author(s):  
Ai-qin Shen ◽  
Jian-ping Xiong ◽  
Jun-hui He ◽  
Tai-jun Liu
Keyword(s):  
Coarse Aggregate ◽  
Pavement Performance ◽  
Cement Concrete

Thermogravimetric Analysis of Limestone Aggregates for Portland Cement Concrete

1998 ◽  
Vol 1619 (1) ◽  
pp. 37-44
Author(s):  
Stephen A. Cross ◽  
Mohamed Nagib Abou-Zeid
Keyword(s):  
Weight Loss ◽  
Thermogravimetric Analysis ◽  
Portland Cement ◽  
Coarse Aggregate ◽  
Pavement Performance ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
The Past ◽  
Good Potential ◽  
Durability Assessment

Durability of coarse aggregate has a major impact on the durability of portland cement concrete. Over the past years, there has been an increasing interest in developing and improving test techniques that provide a more accurate durability assessment, which ultimately leads to a better prediction of pavement performance. Thermogravimetric analysis is a relatively rapid technique that has shown good potential for use in the analysis of carbonate aggregates. Thermogravimetric technique (TG) was used to analyze 31 limestone aggregates. The specimens were heated to temperatures above 1000°C using two rates of temperature increase. The weight loss and the change in weight loss as a function of temperature were recorded. Results show a correlation between the slope before calcite transition and some durability aspects of limestone. Moreover, the TG output can be used to calculate the percent acid insoluble (AI) and the pavement vulnerability factor (PVF). Therefore, TG may be considered as a rapid method for AI and PVF determination.

Research on Coarse Aggregate Gradation of SMA Mixture Influence with Material Properties

2013 ◽  
Vol 700 ◽  
pp. 179-182 ◽  
Author(s):  
Guang Pu Hao
Keyword(s):  
Material Properties ◽  
Coarse Aggregate ◽  
Engineering Application ◽  
Temperature Stability ◽  
Pavement Performance ◽  
Practical Application ◽  
High Temperature Stability ◽  
Aggregate Gradation ◽  
Country Road ◽  
Fruitful Research

SMA is made by a large number of coarse aggregate skeleton formed, so the coarse aggregate gradation on pavement performance of SMA effect. Since 80 time, SMA mixture in many European countries has been widely used. In recent years, our country road workers on SMA mixture also conducted very fruitful research, and started engineering application. In this paper, SMA mixture in practical application, through the coarse aggregate ratio changes as well as the volume and density of tests on high temperature stability influence made some experimental study.

Analysis the Control Techniques of Reflection Crack on Asphalt Overlay of Old Cement Concrete Pavement

2012 ◽  
Vol 204-208 ◽  
pp. 1945-1948 ◽  
Author(s):  
Jue Wang
Keyword(s):  
Main Type ◽  
Concrete Pavement ◽  
Pavement Performance ◽  
Cement Concrete ◽  
Paper Briefly ◽  
Control Techniques ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Reflection Crack ◽  
Technical Measures

Cement concrete pavement is the main type of highway pavement in our country. The asphalt overlay on old concrete pavement is one of the main measures to improve the pavement performance, to improve the bearing capacity and extended service life. But, the prevention of reflection cracks is a key problem need to overcome. This paper briefly analyzes cause of the formed mechanism of reflecting crack of bituminous paving course on old cement concrete pavement, and elaborated some major technical measures of preventing or retarding reflection cracks.

Proportion Design of Autoclaved Cement Concrete Based on High Strength

2011 ◽  
Vol 391-392 ◽  
pp. 161-164
Author(s):  
Tie Quan Ni ◽  
Chang Jun Ke ◽  
Li Zhang
Keyword(s):  
Coarse Aggregate ◽  
High Strength ◽  
Orthogonal Test ◽  
Mineral Admixture ◽  
Mix Design ◽  
Hydration Reaction ◽  
Cement Concrete ◽  
Binder Ratio ◽  
Four Levels ◽  
Water Binder Ratio

According to the particularity of the autoclaved cement concrete that partial aggregate could participate in hydration reaction in the process of autoclaving, the optimal gradation of coarse aggregate and the optimal slurry aggregate ratio is studied, and the effect of water reducing agent for fluidity of cement paste is also studied. The optimized mix design of autoclaved cement concrete based on high strength (compressive strength and flexural strength) is done by orthogonal test with four factors (water-binder ratio, type of mineral admixture, amount and sand ratio) and four levels.

scholarly journals Strength of Concrete containing Rubber as Partial Replacement of Coarse Aggregate

2020 ◽  
Vol 9 (1) ◽  
pp. 2061-2063
Keyword(s):  
Coarse Aggregate ◽  
Partial Replacement ◽  
Structural Elements ◽  
Structural Members ◽  
Rubberized Concrete ◽  
Cement Concrete ◽  
Coarse Aggregates ◽  
Strength Tests ◽  
Rubber Concrete ◽  
Rubber Aggregates

Effective Waste management is the need of the hour in the world. Solid wastes generated by the industries becomes hazardous as days passes by, used tyres are one such waste material that can affect our environment and people. Rubber tyre wastes can be used as partial replacement for the aggregates. In this study, rubber tyre wastes were used as coarse aggregates. And those rubber aggregates are used as partial replacement of coarse aggregates in the cement concrete (5%, 10%, 15%, 20%). The specimens were subjected to different strength tests as per the standards. It is found that the strength of the concrete is greatly reduced as the percentage of replacement of rubber aggregates is increased. Due to their low strength this type concrete cannot be used for load bearing or structural members. However rubberized concrete can be used for non –structural elements and in future a study can be made whether rubber concrete can be used for pavement blocks.

scholarly journals INVESTIGATION OF MECHANICAL PROPERTIES OF PAVER BLOCK MADE WITH EVA POLYMERS AND FLY ASH

2021 ◽  
Vol 9 (02) ◽  
pp. 694-702
Author(s):  
K. Hariharan ◽  
◽  
A. Krishna Moorthy ◽  
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Block Design ◽  
Mix Design ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Curing Process ◽  
Cement Concrete ◽  
Ethyl Vinyl ◽  
Water Absorption Test

The aim of the project is to replace cement with fly ash and course aggregate with Ethyl Vinyl Acetate (EVA) in paver block. In this thesis paver block design is by using cement concrete mixture of mix design M30 which is composed of 10mm coarse aggregate cement and fine aggregate (M-sand).In this thesis the cement is partially replaced with fly ash and partial replacement of EVA with coarse aggregate in paver block at various level of 5, 10, 15, and 20 percentage of its weight. The paver block curing process is done for 7days and 28days. After curing it is checked for its compression strength, water absorption test and densitytest.

A Different Perspective for Investigation of Portland Cement Concrete Pavement Deterioration

1996 ◽  
Vol 1525 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Vernon J. Marks ◽  
Wendell G. Dubberke
Keyword(s):  
Portland Cement ◽  
Coarse Aggregate ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Air Voids ◽  
Pavement Deterioration ◽  
Cement Concrete Pavement ◽  
The Matrix ◽  
History Of ◽  
Crushed Limestone

Many early Iowa portland cement concrete (PCC) pavements provided good performance without deterioration for more than 50 years. In the late 1950s, Iowa was faced with severe PCC pavement deterioration called D-cracking due to crushed limestone containing a bad pore system. Selective quarrying solved the problem. In 1990, cracking deterioration was identified on a 3-year-old US-20 pavement in central Iowa. The coarse aggregate was a crushed limestone with an excellent history of performance in PCC pavement. Examination of cores showed very few cracks through the coarse aggregate particles. The cracks were predominately confined to the matrix. A high-resolution, low-vacuum Hitachi scanning electron microscope with an energy dispersion detector was used to investigate the deterioration. Subsequent evaluation identified a very small concentration of silica gel (silicon) but substantial amounts of sulfur and aluminum (assumed to be ettringite) in the air voids. Some of these voids have cracks radiating from them leading to the conclusion that the ettringite-filled voids were centers of pressure causing the cracks. The ettringite in the voids, after being subjected to sodium chloride brine, initially swelled and then dissolved. The research has indicated that the premature deterioration may be due to ettringite and may have been mistakenly identified as alkali-silica reactivity.

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