Category:1066 Mortars and Grout

This article establishes procedures for inspecting and reporting grout and mortars and designing mixture. Refer to Sec 1066 for MoDOT’s specifications.

For Laboratory testing and sample reporting procedures, refer to 1066.4 Laboratory Testing Guidelines for Sec 1066.

1066.1 Procedure

The components of mortar or grout are to be inspected and reported.

Mortar for Pipe Joints (for Sec 1066.2.1) Cement is to be Type I, unless otherwise specified in the contract and is to be inspected and reported in the same manner as described in 1019 Cement.

Mortar for Grout (for Sec 1066.2.2) Sand shall be clean and shall meet the quality requirements of Sec 1005 except the minus No. 200 (75 _{${\displaystyle \mu \,}$}m) sieve requirement does not apply.

Mortar for Rubble and Brick Masonry (for Sec 1066.2.3) Hydrated lime is to be accepted on the basis of the bag label, manufacturer's certification, or sampling and testing. If sampled, a 5 lb. (2 kg) sample is to be obtained by taking a 1 lb. (400 g) sample from the top of no fewer than 5 bags. The individual samples are to be combined, thoroughly mixed, placed in a cement sample bag with plastic liner and submitted to the Laboratory and a record entered in SiteManager.

Expansive Mortar (for Sec 1066.2.4) Unpolished aluminum powder for use in expansive mortar is to be accepted on the basis of the container label or manufacturer's certification.

Qualified expansive mortars complying with the requirements of Sec 1066.2.4 are listed in Table 1066. Only qualified expansive mortars are to be used. If the contractor requests to use an expansive mortar not listed in Table 1066, the manufacturer of that expansive mortar will be required to submit a 50 lb. (20 kg) sample for approval, the manufacturer's specifications and general data information. The State Construction and Materials Engineer will approve or disapprove the use of the proposed expansive mortar. Upon qualification of this material, it may be accepted for use on the basis of container labeling.

Qualified rapid set concrete patching materials complying with the requirements of MSP 02-01 are listed in Qualified Rapid Set Concrete Patching Material. Refer to MSP 02-01 for more information regarding rapid set concrete patching materials.

1066.2 Mix Design

The proportions for the various grouts and mortars are specified in Sec 1066. The mix characteristics and batch weights (masses) may be calculated in the same manner as described for portland cement concrete in 501 Concrete. It may be necessary to submit samples of sand to the Laboratory for determination of specific gravity and unit weight [mass], if they cannot be ascertained from the "Physical Characteristics of Principal Portland Cement Concrete Aggregates in Missouri."

1066.3 Sample Record

Reports are to indicate acceptance, qualified acceptance, or rejection. Appropriate remarks, as described in 106.9 Reporting Test Results, are to be included in the report to clarify conditions of acceptance or rejection.

Sand, hydrated lime, unpolished aluminum powder and non-metallic expansive mortars shall be reported through SiteManager.

Cement shall be reported as described in 1019 Cement.

1066.4 Laboratory Testing Guidelines for Sec 1066

This article establishes procedures for Laboratory testing and reporting hydrated lime and aluminum powder for masonry and expansive mortar purposes.

1066.4.1 Procedure

Hydrated lime shall be tested according to the methods set forth in ASTM C207 except the chemical analysis shall be conducted in accordance with 106.7.27 TM-27, Determination of Calcium Oxide and Magnesium Oxide in Hydrated Lime.

Qualification of non-metallic expansive mortars for compliance with Sec 1066.1.4.2 will be based on the following procedure:

(a) Manufacturer shall submit a 50 lb. (25 kg) sample, manufacturer's specifications, mixing instructions, and general data.

(b) The non-metallic expansive mortar shall be tested by the following methods:

Percent Chlorides - AASHTO T260

Pullout Test – 106.7.39 TM-39, Pull-Out Tests on Expansive Mortars

(c) Upon completion of Laboratory tests the manufacturer shall be notified by letter whether the expansive mortar is prequalified for use. Each approved brand and the manufacturer's name and address will be added to the Qualified Non-Metallic Expansive Mortars list.

Original test data and calculations shall be recorded in Laboratory workbooks. Test results shall then be recorded through SiteManager.

1066.4.2 Sample Record

The sample record shall be completed in SiteManager, as described in Automation Sec 3510, and shall indicate acceptance, qualified acceptance, or rejection. Appropriate remarks, as described in Reporting Test Results, are to be included in the remarks to clarify conditions of acceptance or rejection. Test results shall be reported on the appropriate templates under the Tests tab.