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- Larger the size of aggregate will decrease strength of the concrete because surface area of this aggregate is low.
- Lesser the size of the aggregate will lead to increase the strength of the concrete.
- Well graded aggregate have all size of particles hence particle interferance is neglected,thus strength of concrete is more.
What else can I help you with?
How does the fineness modulus of aggregates affect the strength of concrete?
how does the fineness modulus of aggregate affect the strength of concrete
What factors affect the compressive strength of concrete?
water /cement ratio
What is the setting and hardening of cement?
Setting of cement is the initial solidifying of the cement. I presume you will not be using a cement material by itself, but by mixing in aggregates and fines to create 'concrete' I will continue this answer talking about concrete but much still applied to a simple cement mortar also. Depending on temperature (warm fast, cold slow) initial set will be between 2 and 24 hours. This will result in a concrete material that can easily be marked with a fingernail. Once the concrete has set, the concrete goes through a process called curing or 'hardening' where the pozzolanic constituents of the concrete 'hydrate' (react with the water) to create a hard material. This will continue for the life of the concrete but the most significant strength gains will be noticed within the first 28 days and this is the strength normally taken as the design strength of the concrete. It can be expected in ideal conditions with warm air and a light breeze in the air, for the concrete to achieve 30% of it's 28 day strength in 1 day 60-80% in 3 days 80-100% in 7 days and 100-% in 28 days Many factors will affect this. temperature will have a large impact. additives such as retarders and accelerators can be added to slow and speed up the hardening process respectively.
What is the Test Procedure to Determine Compressive strength of Hollow Blocks?
Testing the compressive strength of hollow blocks typically follows a standard procedure to ensure accurate and reliable results. Here's a general outline of the test procedure: **Sample Preparation:** Select representative samples of hollow blocks from the production batch. Ensure the samples are free from defects and have been cured appropriately. **Conditioning:** If the blocks are not already at room temperature, allow them to acclimate to the testing environment. **Equipment Setup:** Set up the compression testing machine according to standards or specifications. Ensure the machine is calibrated and in good working condition. **Sample Identification:** Mark each sample with a unique identifier for accurate tracking of results. **Moisture Content Check (if applicable):** Determine and record the moisture content of the samples, especially if it can affect the compressive strength. **Testing Procedure:** Place the hollow block specimen on the compression testing machine. Align the specimen so that the load is applied evenly on the blocks. Gradually apply a compressive load at a uniform rate until failure occurs. Record the maximum load at failure and note any signs of distress in the specimen. **Calculation of Compressive Strength:** Calculate the compressive strength using the formula: Compressive Strength = Maximum Load / Cross-sectional Area of the Block. **Reporting:** Document all relevant information, including sample identification, moisture content, and compressive strength values. Prepare a test report with details of the testing procedure, equipment used, and results obtained. **Quality Control:** Compare the results with specified standards or requirements to ensure the hollow blocks meet the desired compressive strength. **Data Analysis:** Analyze the data for any trends, variations, or anomalies that may indicate issues with the production process. **Documentation and Archiving:** Keep a record of the test results and associated documentation for future reference or quality control purposes. It's crucial to follow specific standards or guidelines relevant to the type of hollow blocks being tested, as procedures may vary based on factors such as block dimensions, material composition, and testing conditions. Always adhere to industry standards or applicable building codes for accurate and meaningful results.
What are the pros and cons on reinforced concrete?
The main advantage to reinforced concrete is that it has a "inherent structural strength. The disadvantage would be in certain climates where it is cold as the heat is able to leave the structure.
How does fineness modulus of aggregates affect the strength of concrete?
how does the fineness modulus of aggregate affect the strength of concrete
How does the fineness modulus of aggregates affect the strength of concrete?
how does the fineness modulus of aggregate affect the strength of concrete
What factors affect the compressive strength of concrete?
water /cement ratio
Why fineness modulus of coarse aggregates is more than that of fine aggregates?
how does the fineness modulus of aggregate affect the strength of concrete
How does the moisture affect the strength values of concrete?
the moisture of concrete is main strength for reinforced concrete structure
How does the deleterious material affect the properties of aggregates?
Deleterious material in aggregates can weaken the overall strength of the material, reduce durability, and increase the potential for deterioration due to chemical reactions or expansion. It can lead to poor bond between aggregates and the binder, causing issues such as cracking and reduced load-bearing capacity in concrete or asphalt mixes.
What is the mix for concrete and how does it affect the strength and durability of the final product?
The mix for concrete typically includes cement, sand, gravel, and water. The ratio of these ingredients affects the strength and durability of the final product. A higher ratio of cement to sand and gravel results in stronger concrete, while the proper amount of water is crucial for the mixture to bond and cure properly. Adjusting the mix can impact factors like compressive strength, durability, and resistance to cracking.
How does Curing of concrete affect its design strength?
It increases its strength, generally speaking.
How the moisture content of the aggregates obtainable at site affect the water content ratio specified?
Obviously, if the aggregates are in a surface wet condition, meaning the moisture content is greater than the absorption, that surface water increases the water-to-cement ratio and affects strength and durability.
Why it is not suitable for all concrete mixture when the amount of fine aggregate and coarse aggregate is fixed in sieve test?
Why it is not suitable for all concrete mixture when the amount of fine aggregate and coarse aggregate is fixed?
What factors affect the workability of a concrete mix?
1),water content 2),mix praportions 3),size of aggregates 4),shape of aggregate 5),surface texture 6),grading of aggregates 7),use of admixture
How coarse aggregate shape affect workability?
Aggregates with angular particles are more difficulties to compact than one with rounded particles and therefor,requires more water in the mix to act as alubricant.this additional water, on evaporation ,tends to leave void spaces in the hardened concrete made with rounded aggregates particles which requires less water for compaction.the nature of the particles of an aggregates will also affect workability.(
