Pervious concrete is a concrete which allows the water to pass through it. The pervious concrete contains cement, coarse aggregates, water and admixtures if needed. It has no sand in it which results in large amount of voids in the previous concrete. This sole property of having voids play a vital role in the functioning of the pervious concrete i.e; allowing water to pass through it.
The pervious concrete has a disadvantage that it has less compressive strength when compare to normal concrete this backdrop in pervious concrete because pervious concrete is a no fines concrete it has no sand the sand which plays a vital role in the strength gain of the concrete hence we in our study has concentrated in improving the compressive strength but at the same time the permeability and void content should also not affected because permeability and void content are two most important properties of the pervious concrete which makes it the pervious concrete so basically we have also conducted study on the permeability and void content of the pervious concrete.
In our study we have added different sizes of coarse aggregates such as 20 m, 12 mm, 12 +2 0 mm and we have added the sand percentages at 0 %, 0.25 %, 0.75 % and the compressive strength was checked on 7,14,28,56,90 days respectively and we have checked the permeability and void content at 28 days.
Table of Contents
CHAPTER-1 INTRODUCTION
1.1 General
1.2 Pervious concrete
1.3 History
1.4 Pervious concrete Indian scenario
1.5 Need for present work
1.6 Objectives of the present work
1.7 General Properties of pervious concrete
1.8 Advantages of pervious concrete
1.9 Disadvantages of pervious concrete
1.10 Major application of pervious concrete
1.11 Organization of thesis
CHAPTER-2 LITERATURE REVIEW
2.1 General
2.2 Composition of concrete
2.3 Properties of concrete
2.4 Literature analysis
CHAPTER-3 CONCRETE INGREDIENTS AND THEIR PROPERTIES
3.1 General
3.2 Materials used
3.2.1 Cement
3.2.2 Benefits of cement
3.2.3 Tests conducted on the cement and results
3.3 Aggregates
3.3.1 Classification of aggregates
3.3.2 Properties of aggregates
3.4 Classification of aggregates
3.4.1 Particle shape and texture
3.4.2 Bond of aggregates
3.4.3 strength of aggregates
3.4.4 Deterious substances
3.4.5 Grading of aggregates
3.4.6 Maximum size of coarse aggregates
3.4.7 Fine aggregates
3.5 Test conducted on fine aggregates
3.6 Tests conducted on coarse aggregates
CHAPTER-4 EXPERIMENATL INVESTIGATION
4.1 General
4.2 Workability of pervious concrete
4.2.1 Slump cone test
4.3 Tests on pervious concrete
4.3.1 Bulk Density
4.4 Void Content
4.4.1 Void content for calculation for 0 % of fines for 20mm aggregates
4.4.2 Sample calculation
4.4.3 Void content for calculation for 0% of fines for 12mm aggregates
4.4.4 Sample calculation
4.4.5 Void content for calculation for 0% of fines for 20mm aggregates
4.4.6 Sample calculation
4.5 Permeability
4.6 Permeability calculation procedure
4.7 Storage capacity
CHAPTER 5 MIX DESIGN OF PERVIOUS CONCRETE
5.1 General
5.2 Mix design of pervious concrete
5.2.1 Void content
5.2.2 Bulk density
5.2.3 Water content
5.3 Mix design criteria
5.4 NRMCA mix design procedure
5.4.1 Quantity of materials obtained for 0% of addition of sand
5.4.2 Quantity of materials obtained for 0.25% of addition of sand
5.4.3 Quantity of materials obtained for 0.75% addition of sand
5.5 Compressive strength of pervious concrete
5.6 Preparation of cube specimen
5.6.1 Mixing
5.6.2 Hand mixing
5.6.3 Preparing of cubes for placing concrete
5.6.4 Sampling
5.6.5 Symbolizing the specimens
5.6.6 Curing
5.6.7 Procedure after curing specimens
5.7 Compressive strength of pervious concrete
CHAPTER 6 COMPRESSIVE STRENGTH OF PERVIOUS CONCRETE
6.1 Compressive strength
CHAPTER 7 COST COMPARISION
7.1 General
7.2 Cost comparison between convectional concrete and pervious concrete
CHAPTER 8 CONCLUSION
8.1 Conclusion
8.2 Scope for future work
CHAPTER 8 REFERENCES
9.1 References
Research Objectives & Topics
This study focuses on experimental investigations of pervious concrete, specifically analyzing the impact of varying aggregate sizes and the addition of sand on mechanical properties such as compressive strength, permeability, and void content to provide effective solutions for urban stormwater management.
- Optimization of mix design for pervious concrete using different aggregate sizes (12mm, 20mm, and combinations).
- Investigation of the effects of sand addition (0%, 0.25%, 0.75%) on structural and hydrological performance.
- Evaluation of compressive strength development over 7, 14, 28, 56, and 90 days.
- Analysis of permeability and void content in relation to mix proportions and material components.
- Cost comparison between pervious and conventional concrete to assess economic feasibility for practical application.
Excerpt from the Book
1.2 PERVIOUS CONCRETE:
Pervious concrete has elective names as No fines solid, Gap stratified concrete and pervious cement. we can comprehend it from its name its self that it's a blend of bond, Aggregates and water we don't utilize sand in pervious cement. we can know it from its name its self that it is blend of bond, Aggregates and water we don't utilize sand in pervious concrete. the pervious concrete is configuration to fill in as a tempest water administration framework and it has been dynamically functioning admirably . at whatever point there is a tempest the rain water is gathered by pores of pervious concrete and let the rain water to course through the solid and after that from solid layers the tempest water is send to the pipe framework and from the pipe framework the tempest water is gathered and put away for later utilize.
Since from the above issue we have an unmistakable view that it has same materials as in typical concrete with the exception of sand however the other intriguing things about it that it has "voids possessing 15% to 30% of its aggregate volume". The pervious concrete has void proportion of that degree so it can deplete the tempest water with in it. It enables the 11.35 to 18.97 liters of water for each moment per square foot i.e; 0.0929sq.m of surface region.
Summary of Chapters
CHAPTER-1 INTRODUCTION: Outlines the significance of pervious concrete as an eco-friendly material for stormwater management and establishes the research objectives.
CHAPTER-2 LITERATURE REVIEW: Reviews existing studies on concrete composition, properties, and specific performance benchmarks of pervious concrete.
CHAPTER-3 CONCRETE INGREDIENTS AND THEIR PROPERTIES: Details the materials used, including cement and aggregates, and standard laboratory tests conducted to verify their suitability.
CHAPTER-4 EXPERIMENATL INVESTIGATION: Describes the methodology for testing workability, bulk density, void content, and permeability of the concrete specimens.
CHAPTER 5 MIX DESIGN OF PERVIOUS CONCRETE: Explains the mix design procedures, material quantities, and specimen preparation methods adopted for the experimental study.
CHAPTER 6 COMPRESSIVE STRENGTH OF PERVIOUS CONCRETE: Presents the compressive strength results for various mixes at different curing ages and analyzes the performance data.
CHAPTER 7 COST COMPARISION: Compares the financial implications and construction costs of pervious concrete versus conventional concrete.
CHAPTER 8 CONCLUSION: Summarizes the experimental findings, confirming the impact of aggregate size and sand content on strength and permeability.
CHAPTER 8 REFERENCES: Lists the academic and technical sources consulted for this research project.
Keywords
Pervious concrete, Compressive strength, Permeability, Void content, Coarse aggregates, Sand addition, Stormwater management, Mix design, Bulk density, Curing, Civil engineering, Sustainable pavement, Structural integrity, Water infiltration, In-place density.
Frequently Asked Questions
What is the primary focus of this research?
The research explores the experimental performance of pervious concrete by analyzing how varying aggregate sizes and the inclusion of small percentages of sand affect its compressive strength, permeability, and void content.
What are the key thematic areas covered?
The study covers mix design, mechanical properties testing, hydrological efficiency (permeability and storage), and a comparative economic analysis between pervious and conventional concrete pavements.
What is the main objective of this study?
The primary objective is to determine an optimal mix proportion that balances structural strength with the necessary drainage capacity to mitigate urban water logging and flooding.
What scientific methods were employed?
The study utilizes experimental laboratory testing, including standard slump tests, bulk density measurements, variable head permeability tests, and compressive strength testing on casted concrete cube specimens over several curing periods.
What does the main part of the report cover?
The main body details the material characteristics, the specific mix design procedures, the step-by-step experimental investigation, and the resulting data (tables and graphs) illustrating the relationships between ingredients and performance metrics.
Which keywords best describe this work?
Key terms include pervious concrete, compressive strength, permeability, void content, and stormwater management, which characterize the engineering and environmental focus of the paper.
How does the addition of sand affect the pervious concrete?
According to the findings, adding small percentages of sand influences the trade-off between structural strength and permeability; while it may increase strength, it reduces the void ratio and thus the drainage capacity of the material.
What is the significance of the cost comparison section?
It demonstrates that while initial material costs may vary, pervious concrete is often more economical in the long run because it functions as an integrated drainage system, reducing the need for separate infrastructure like retention ponds and underground piping.
- Quote paper
- Shaik Chandini (Author), 2018, Strength, permability and void content on pervious concrete with varying sizes of aggregates, Munich, GRIN Verlag, https://www.grin.com/document/520735
