1066.1 Scope. This specification covers mortars and grout for use in pipe joints, rubble and brick masonry.
1066.2 Mortars and Grout. Mortars and grout shall be mixed in small quantities as needed and shall not be
retempered or used after setting has begun. Type I Portland cement shall be accordance with Sec 1019. Sand shall be clean and shall be in accordance with Sec 1005, except the minus No. 200 sieve requirement will not apply. Water shall be in accordance with Sec 1070.
1066.2.1 Mortar For Pipe Joints. Mortar shall consist of one part Type I Portland cement and two parts sand,
by volume, mixed with sufficient water to form a plastic mortar.
1066.2.2 Mortar for Grout. Mortar used for grout shall consist of one part Type I Portland cement and three
parts sand, by volume, mixed with sufficient water to form a grout of proper consistency.
1066.2.3 Mortar For Rubble and Brick Masonry. The mortar shall be composed of one part Portland cement
plus 10 percent, by volume, of hydrated lime and of two parts sand by volume. Hydrated lime shall be in accordance with ASTM C 207, Type N. After the dry material has been thoroughly mixed, water shall be added, and the mixture shall be turned and chopped by hand or mechanical methods until a stiff mortar results. Mortar shall be mixed no more than 30 minutes prior to use. Mortar for pointing shall be mixed in the proportions of one part Portland cement to one part sand by volume.
1066.2.4 Expansive Mortar.
1066.2.4 1 Expansive Mortar. The mortar shall consist of one part Type I or 1L Portland cement and three parts
sand, by volume, mixed with sufficient water to form a stiff plastic mortar. A shrinkage compensating additive meeting the requirements of ACI PRC-223 Type G or Type K shall be used. The target 28-day expansion when tested according to ASTM C878 shall be between 0.02% and 0.15%. The manufacturer shall specify the dosage rate.
1066.2.4 2 Other Expansive Mortars. Upon approval from the engineer, other expansive mortars may be used.
The expansive mortars shall contain no more than 0.02 percent chlorides by weight and, when subjected to a pull-out test, shall equal or exceed the results of tests conducted using the material specified in Sec 1066.2.4.1.
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