MaTestLab > Test Standards > ASTM C295 Standard Procedure for Petrographic Analysis of Concrete Aggregate
Last updated 18th March 2025
ASTM C295 Standard Procedure for Petrographic Analysis of Concrete Aggregate
ASTM C295 describes the methods for assessing materials that are recommended for use as aggregates in cementitious blends. It offers instructions on how to use petrographic techniques to examine aggregates for concrete, what attributes to search for, and how much to use. The manual also recommends identifying rocks and minerals in reports using descriptive nomenclature (ASTM C294). Petrographic analysis identifies particles of various sizes and shapes in the aggregates. These particles badly affect the strength of the concrete; therefore, testing is mandatory. The ASTM C295 method also analyzes the physical and chemical properties and the types of constituents present in the aggregates. Chemically unstable constituents are also identified by using ASTM C295.
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ASTM C295 Introduction
ASTM C295 is a thorough reference for assessing materials meant to be used as aggregates in cementitious mixes. It highlights how crucial it is to identify pollutants, potentially reactive ingredients, and unstable minerals in aggregates. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out ASTM C295 tests for our clients. Determining the chemical and physical properties of the rocks and minerals found in aggregate samples is mostly dependent on petrographic analysis. ASTM C295 offers valuable insights for aggregate selection through petrographic analysis.
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ASTM C295 Test Methods
Apparatus Setup
A rock-cutting saw with an automated feed and a diamond blade of about 350 mm in diameter; petrographic microscope equipped with polarizing filters and other parts; a horizontal grinding wheel with a diameter of 400 mm; a system for precise interpretations of petrographic image analysis; thin-section slides, coverslips, and mounting media are among the equipment used in thin-section preparation; and additional necessary materials such as safety gear, staining chemicals, and kits for petrographic thin sections.
Methods for Aggregate Selection
Representative samples of materials are collected and tailored as per ASTM standards. The petrographic examination of the ASTM C295 specimen is done to identify the desired traits. Various properties are analyzed and thorough testing is done to detect the presence of contaminants. Based on petrographic examination, a suitable aggregate is selected.
ASTM C295 Equipment and Sample Preparation
Specimen Details
The petrographer tailors the given specimen.
Specimen Dimensions
Dimensions may vary for each sample.
Specimen Preparation
The specimen must be clean and debris-free, and the sample size is reduced per the ASTM requirements.
ASTM C295 Test Results and Interpretation
Testing results show the contaminants, and various chemical and physical properties of the aggregate based on which perfect aggregate is selected. ASTM C295 holds significance in the construction and manufacturing industries.
Tests Related to ASTM C295
ASTM C295 is similar to ASTM C127 which provides information for finding adsorption and specific gravity of various coarse aggregates.
Use of ASTM C295 in Various Industries
It is an extensively used procedure in the construction, infrastructure, and mining industries for evaluating aggregate sources for roads, bridges, buildings, characterizing quarry materials, and identifying aggregates that are prone to deterioration under adverse environmental conditions.
Materials Commonly Tested with ASTM C295
The standard is used for examining the primary materials, including crushed stone, sand, and gravel, as well as supplementary cementitious materials like fly ash and slag to check for harmful constituents like sulfides, alkali-reactive minerals, and weak particles.
Importance of ASTM C295
It is an important standard that helps identify unsuitable aggregates in construction, thus leading to the selection of durable materials, reduced maintenance costs, and enhanced safety. It addresses the petrographic properties of aggregates to mitigate risks from chemical reactions, abrasion, and environmental degradation.
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Where can I get the astm c295 tested?
You can share your astm c295 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm c295 test to various testing techniques.
How much do I need to pay for the astm c295 test?
Please contact us for a detailed quote for your astm c295 testing needs. Cost incurred to carry out different astm c295 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm c295?
The required number of samples or specimens should comply with the procedure given in the astm c295 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm c295 test?
MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm c295 test?
The turnaround time for astm c295 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm c295 tested?
You can share your astm c295 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm c295 test to various testing techniques.
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