Scope* C Specification for Grout for Masonry. ASTM Standards:2 f 'mspecified compressive strength of masonry. C Specification for Aggregate for Masonry Mortar meets the specified compressive strength. C Resistencia a La Compresion de Prismas de Mamposteria - Download as PDF File .pdf), Text File .txt) or read online. astm. This test method covers procedures for masonry prism construction and testing, and procedures for determining the compressive strength of masonry, fmt, used to determine compliance with the specified compressive strength of masonry, f 'm. When this test method is used for research.
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Home; ASTM C standard by ASTM International, 12/01/ . View all Printed Edition + PDF;; Immediate download; $; Add to Cart. Technical Data APPLICABLE STANDARDS ASTM International •ASTM C90 ASTM C - Standard Test Method for Constructing and Testing Masonry. This test method provides a means of evaluating compressive strength characteristics of in-place masonry construction through testing of prisms obtained.
When prisms are used for other FIG. C 11a purposes, grout prisms not less than 4 h nor more than 48 h following the construction of the prisms.
NOTE 4Testing of prisms may be part of a projects field quality control or assurance program. These prisms are intended to be representative of a constructed masonry element such as a wall, column, pilaster, or beam.
They are built as companions to the masonry element at a jobsite where the masonry element is site-constructed, or within a factory or shop where the element is shop-built. Prisms may also be fabricated in a laboratory for research purposes. Use grout representative of that used in the corresponding construction.
Before placing grout, remove mortar droppings from the grout space. Use grout consolidation and reconsolidation procedures representative of those used in the construction. Place additional grout into the prisms as necessary after each consolidation.
Screed off excess and finish the grout so that it is level with the top of the prism and in contact with the units at the perimeter of the grout space. Grouted prisms shall contain no reinforcement.
Brace forms to prevent displacement during grouting. Grout as described in 5. Do not disturb or move prisms for the first 48 h after construction and grouting. Keep prisms in the moisture-tight bags until 48 h prior to testing. Obtaining and Transporting Masonry Prisms 6. Secure prisms and specimens to prevent jarring, bouncing, or tipping over during transporting.
Extend storage time as needed to ensure dry surface conditions of the prisms at the time of testing. Test a set of prisms at each age. Prism age shall be determined from the time of laying units for ungrouted prisms, and from the time of grouting for grouted prisms. Measurements and Determination of Net Area 8.
Determine the length and width by averaging the four measurements of each dimension. Measure the height of the prism at the center of each face to the nearest 0.
Determine the height by averaging the four measurements. NOTE 5Prisms obtained from field-removed masonry specimens will have many different sizes, shapes, and configurations. These variations are a result of differing bonding arrangements, mortaring or joining practices, presence of reinforcement and other accessories in conjunction with the masonry in service, and of techniques used to remove the specimens from wall assemblies.
These variations may create non-uniform prism dimensions along its length or in its cross-section. As such, additional measurements are often required to adequately document the condition of the prism and to communicate that condition to readers of the test report.
Curing 7. If cut units are used for prism construction, determine the net cross-sectional area from additional units cut in a similar manner.
Determine net cross-sectional area of fully grouted prisms by multiplying the length and width of the prism see 8. NOTE 6Net area determined by Test Methods C for hollow concrete units is usually slightly different from the minimum net crosssectional area because unit face shells and webs are typically tapered.
Net area for prisms obtained from fieldremoved masonry specimens is considered to be minimum bearing area. If prisms are not of uniform length or width throughout the height of the specimen, or if mortared surfaces are not fully bedded, use professional judgment to determine the minimum bearing area that exists for the prism at whatever location that occurs.
NOTE 7While constructed prisms are required to be fully-bedded with mortar, prisms obtained from field-removed masonry specimens, particularly for hollow masonry, will often have only the face shells of the hollow units mortared.
For such prisms, if any mortar on the top and bottom bearing surfaces of the prisms are removed to result in full bearing across the unit cross-section, the minimum cross-section will typically occur at an intermediate mortar bed joint. For face shell bedded sections, multiplying the measured length of the prism at the bed joint location by the sum of the face shell thicknesses can be an effective method for determining minimum net bearing area.
Because the face shells of hollow units are often tapered, the thickness of the face shell above the mortar bed joint and below the mortar bed joint may differ. In such a case, use the least face shell thickness of the two in the calculation. Obtaining access to measure face shell thickness is often difficult or impossible. Measurements of similar cross-sections from representative units or other parts of the prism is an option as is performing measurements after testing is performed.
Refer to Test Methods C67 and C for recommended methods of measuring face shell thickness. Capping 9. Procedure The upper platen shall be a spherically seated, hardened metal block firmly attached at the center of the upper head of the machine.
The center of the sphere shall lie at the center of the surface held in its spherical seat but shall be free to turn in any direction, and its perimeter shall have at least 14 in. The diameter of the upper platen determined in accordance with A1. Typical uses for laminated glass include locations where safety glazing material is required,. Pdf , Text File.
Terminology: crush. But the transition from words to actions demands tangible measures. One Source for Wall Systems. Designation: C Most backordered items can be rushed in from the publisher in as little as 24 hours. This document is available in either Paper or PDF format. The important characteristics of aggregates for concrete are listed in Table 5- 2 and most are discussed in the following.
Reserves to itself the right to change the content of the catalogue without prior notice.