Minnesota Department of Transportation (MnDOT) · 2025 Standard Specifications for Construction
Section 3128 — Aggregate for Use in Masonry Mortar
Minnesota 2025 Standard Specifications for Construction, Section 3128. Full text, cross-references and related pay items on BuildSpec.
3128 AGGREGATE FOR USE IN MASONRY MORTAR 3128.1 SCOPE Provide fine Aggregate for use in masonry mortar. 3128.2 REQUIREMENTS Provide Aggregate for use in masonry mortar meeting the requirements of ASTM C144, Standard Specification for Aggregate for Masonry Mortar. The gradation requirements of ASTM C144 are shown in Table 3128.2-1. Table 3128.2-1 Mortar Aggregate Gradation Limits Sieve Size Percent Passing No. 4 100 No. 8 95 – 100 No. 16 70 – 100 No. 30 40 – 75 No. 50 10 – 35 No. 100 2 – 15 No. 200 0 – 5 The Engineer may allow Aggregate meeting the gradation requirements of 3126.2C, “Gradation…
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