Seminar on the topic light weight concrete

..

1. LIGHT WEIGHT CONCRETE USING VERMICUILATE AS FINE AGGREGATE GUIDED BY: JAYA P PRESENTED BY SARANG THULASI ROLL NO:59 SEMESTER:5

2. 2 CONTENTS Introduction Vermiculate Objectives Material used Case study Methodology Manufacturing Test to be conducted Advantages Disadvantages Conclusion Reference

3. 2 WHAT IS LIGHT WEIGHT CONCRETE ? Light weight concrete is a special concrete which weighs lighter than conventional concrete. Density of this concrete is considerably low (300 kg/m3 to 1850 kg/m3) when compared to normal concrete (2200kg/m3 to 2600kg/m3). May consist of light weight aggregate such as clinker, crushed stones, aggregate of organic and inorganic materials- like pertile , vermiculite etc.

4. Vermiculite is a phyllo-silicate mineral group and is micaceous in nature It is used in the construction, agricultural, horticultural and industrial markets. It is found in so many parts of the world but only a limited number of sources are worked as commercial deposits . It can expand or exfoliate many times (commercial varieties exfoliate 8 to 20 times or more) the original thickness when heated . Vermiculite exists in so many colors from black through various shades of brown to yellow. Its chemical composition consists of complex hydrated aluminum, magnesium silicate. VERMICUILATE

5. VERMICUILATE

6. OBJECTIVES • The objective is the development of normal strength in lightweight concrete by replacing natural sand by vermiculite minerals for superior strength, density and fire-resistant characteristics. • C ompare the variation of compressive strength at 7 days, 14 days and 28 days curing strength with conventional cube. • C ompare the performance conventional and vermiculite minerals in lightweight concrete. • F ind out the difference in weight of normal conventional and light weight concrete by casting a cube. • S tudy the physical and chemical properties of vermiculite minerals and the ingredients In lightweight concrete

7. MATERIAL USED > Cement :Portland cement is commonly used as binding agent in concrete block . Vermicuilate : This is light weight aggregate that replace all fine aggregate and reduce shrinkage. > Course aggregate : It is used to get strength for concrete block. Water : Water is essential for hydration of cement and the proper setting of concrete mix .

8. CASE STUDY Study on Strength Properties of Light Weight Concrete with Exfoliated Vermiculite. Dr. M. John Robert Prince.et.al (2020) stimulated the use of vermiculate as a partial replacement of fine aggregate gives a much better compressive strength. The experimental investigations were carried out to study compressive, flexure, and tensile strength parameters by replacing 5, 10, and 15% of vermiculite with fine aggregate. On replacing fine aggregate by 10% with exfoliated vermiculite the compressive strength of concrete was found to be comparable to the reference mix . The experimental results we concluded that 10 % replacement of vermiculite good in compression strength, split tensile strength and flexural strength workability of the concrete decreased with increase in exfoliated vermiculite content in the mix.

9. Mixing process The materials are batched and mixed on the appropriate proportions Moulding and curing Placed in mould and curring in done METHODOLOGY Material preparation All materials except vermiculate are locally available Quality test Different test are done to evaluate the product. 8 Mix design The vermiculate is added in proportions as a partial substitute to fine aggregate

10. MANUFACTURING OF CONCRETE BLOCK The production of concrete involves the following steps: • Cleaning and Fixing mould • The cubes of standard size (150x150x150)mm mould are used. • The inside of the mould is oiled and the entire mould is assembled in two parts to make it easy to demould and remove the conc . • Batching of raw materials • Batching was done as per mix proportion with the help of electronic weight balance. The weight of all ingredients was taken as per mix proportion. • Mixing Hand mixing and machine mixing was carried out. The main purpose of mixing of concrete is to obtain a uniform mixture that shows uniformity in terms of colour and consistency

11. • Casting; Before placing the concrete, moulds were cleaned and oiled to prevent the formation of bond between concrete and mould . Concrete was filled in moulds placed on a plane surface to avoid unevenness before the initial setting time.concrete arefilledin three layering. • Compacting ; The fresh concrete filled in the mould were laid in three layers by hand compaction • Demoulding : Test specimens were demoulded after 24 hours. After this period of time the concrete has achieved sufficient strength to enable demoulding without damaging the specimen .

12. After demoulding , each specimen was marked with a visible identification on the top or bottom using a waterproof crayon or ink. • Curing : The specimens were immersed in curing tank for 7 days, 14 day and 28 days. Cleaning and Fixing mould Batching of raw materials

13. Mixing Casting Demoulding Curing

14. MATERIAL TEST >Specific gravity of cement > Intial and Final setting time for cement >Sieve Analysis for vermicuilate >Sieve Analysis for coarse aggregate SPECIMEN TEST >Compressive Strength Test compressive strength = Maximum load Cross sectionl Area

15. ADVANTAGES Light weight : Vermicuilate is lighter than fine aggregate like sand,reduce weight of concrete blocks,easier to handle, transport and install Fire Resistance : Vermicilate is naturally fire resistant ,which can enhance fire resistance of concrete blocks Workability and Handling : Vermicuilate mixes well with cement and water,enhancing workability of concrete mix . Sound Insulation : Depending on density and configuration of blocks, Vermicuilate can provide good acoustic insultion property Thermal Insulation : Vermicuilate is a good thermal insulation property.concrete block reduce heat transfer through walls

16. DISADVANTAGES Cost : vermicuilate is more expensive than traditional aggregate like sand Mix Design : right mix design with vermicuilate requires careful consideration of proportion and properties Moisture Absorption : vermicuilate may absorb moisture.It will effect the durability and performance of concrete

17. CONCLUSION The introduction of light weight concrete and its different derivatives. To study the effect of using Vermiculite as the 0%, 5%, 10% and 15 % replacement of fine aggregate in concrete composites Compressive test for 7, 21 and 28 days were studied on the materials of the concrete composites From this case study we can understand, The increase in Compressive strength of the Concrete moreover, durability results in some proportions. Due to this vermiculite can be considered as a very high efficient replacement material.

18. REFERENCE > Dr . M. John Robert Prince.et.al (2020) Study on Strength Properties of Light Weight Concrete with Exfoliated Vermiculite > Wikipedia Google Chatgpt

19. THANK YOU