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ASTM C780-12a
Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry (Includes all amendments And changes 5/21/2014).
Automaticky přeložený název:
Standardní zkušební metoda pro Preconstruction a Výstavba Vyhodnocení malt pro Plain a zesílená Unit Zdivo
NORMA vydána dne 15.12.2012
Informace o normě:
Označení normy: ASTM C780-12a
Poznámka: NEPLATNÁ
Datum vydání normy: 15.12.2012
Kód zboží: NS-15042
Počet stran: 14
Přibližná hmotnost: 42 g (0.09 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM C780-12a :
Keywords:
aggregate ratio, air content, compressive strength, concrete penetrometer, cone penetrometer, consistency, consistency retention, mortar, ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)
Doplňující informace
| Significance and Use | ||||||||||||||||||||||||||||||||
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5.1 During preconstruction and construction evaluations, use of these test methods establishes specific and overall performance characteristics for the mortar system. 5.2 Preconstruction testing of mortars prebatched by weight provides information for the selection of the individual mortar system best suited for the masonry to be constructed. The recommended tests and their significance are as follows: 5.2.1 Consistency determinations by cone penetration (5.2.2 Consistency retention by cone penetration (5.2.3 Mortar water-content determinations (5.2.4 Mortar aggregate ratio testing (5.2.5 Mortar air-content testing (5.2.6 Compressive strength testing (5.3 Testing during the actual construction may employ one or more of the test methods described in 5.3.1 Consistency by cone penetration (5.3.2 Consistency retention by cone penetration (5.3.3 Individual and repeated evaluations of mortar water content (Annex A4) show the ability of the mixer operator to properly and consistently add water to the mixer. 5.3.4 Individual and repeated tests for mortar aggregate ratio (5.3.5 Individual and repetitive tests for mortar air content (Annex A5) show the changes caused by variations in mixing time, mixing efficiency and other factors. 5.3.6 Comparison of compressive strength tests (1.1 This test method covers procedures for the sampling and testing of mortars for composition and for their plastic and hardened properties, either before or during their actual use in construction. 1.2 Preconstruction
Evaluation—This test method permits comparisons of mortars made
from different materials under simulated field conditions. It is
also used to establish baseline values for comparative evaluation
of field mortars.
1.3 Construction Evaluation—Use of this method in the field provides a means for quality assurance of field-mixed mortar. It includes methods for verifying the mortar mix proportions, comparing test results for field mortars to preconstruction testing, and determining batch-to-batch uniformity of the mortar. 1.4 The test results obtained under this test method are not required to meet the minimum compressive values in accordance with the property specifications in Specification C270. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and determine
the applicability of regulatory limitations prior to use.
Standard Test Method for Compressive
Strength of Cylindrical Concrete Specimens Standard Terminology of Mortar and Grout
for Unit Masonry (Withdrawn 2025) Standard Test Method for Relative Density
(Specific Gravity) and Absorption of Fine Aggregate Standard Test Method for Air Content of
Freshly Mixed Concrete by the Pressure Method Standard Specification for Mortar for
Unit Masonry (Includes all amendments and changes 1/16/2026). C1231 Practice for Use of Unbonded Caps in
Determination of Compressive Strength of Hardened Cylindrical
Concrete Specimens Standard Guide for Quality Assurance of
Mortars Standard Specification for Woven Wire
Test Sieve Cloth and Test Sieves Standard Test Method for Air Content of
Freshly Mixed Concrete by the Volumetric Method Standard Test Method for Air Content of
Hydraulic Cement Mortar Standard Test Method for Amount of Water
Required for Normal Consistency of Hydraulic Cement Paste Standard Specification for Molds for
Forming Concrete Test Cylinders Vertically Standard Specification for Mixing Rooms,
Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the
Testing of Hydraulic Cements and Concretes Standard Practice for Capping Cylindrical
Concrete Specimens Standard Practice for Accreditation of
Testing Agencies for Masonry Standard Test Method for Compressive
Strength of Hydraulic Cement Mortars (Using 50 mm [2 in.] Cube
Specimens) |
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