Mortar. All mortar shall conform to ASTM C-476 and shall have a compressive strength of 1800 psi in 28 days.
Mortar. 1. One component, cement based, fiber reinforced, shrinkage compensated, gray in color, with a
Mortar. 4 The first sentence of the first paragraph is revised to read: 6 Fine aggregate for portland cement or blended hydraulic cement mortar shall consist of 7 sand or other inert materials, or combinations thereof, accepted by the Engineer, having 8 hard, strong, durable particles free from adherent coating. 9
Mortar. The mortar joints shall be in accordance with the Supplier’s design which will include the average design mortar joint thickness and maximum and minimum mortar joint thicknesses. All mortar joints shall be full and tight with no air inclusions or voids. The bricks shall be buttered on three sides and pressed into place. Excess mortar shall be cleaned off with a trowel and mortar surface finished. During the work, LGL or its inspector will have the right to request the Contractor to remove random bricks to ensure that mortar coverage is complete on the brick backside. The mortar mix, its application, and curing shall be made in strict accordance with the mortar manufacturer’s instructions. Mixed mortar life, as specified by the manufacturer, shall be strictly adhered to and not exceeded. Nothing shall be added to prepared mortar to extend its life beyond that specified by the manufacturer. Leftover mortar, not used within the prescribed hardening time, shall be discarded.
Mortar. Samples of mixed mortar shall be randomly taken once per day during installation of the brick lining. Sufficient material shall be taken to make three 2.54 cm right cylinders from each mix. Consistency in taking the samples is important. The samples shall be uniformly cured at 20°C for seven days or 20 °C for 24 hours and 60°C for 16 hours. Following curing, the Contractor shall perform compressive strength in accordance with ASTM C579, method A and water adsorption tests in accordance with ASTM C413 on one of the cylinders from each batch. The compressive strength of the mortar samples shall be greater than 90% of the value specified by the supplier for that mortar type. If the sample fails the test, then the Contractor shall test a second sample. If the 2nd sample also fails, then LGL and the Contractor shall evaluate the impact of the failed sample and, at its discretion, LGL may require the affected brick lining affected by the sub-standard mortar, reinstalled at no cost to LGL. Untested samples will be delivered by the Contractor to LGL clearly identifying the lot number, date manufactured, batch number, batch time/cure time, compressive strength, and water absorption as documented in the Contractor’s QA/QC documentation. LGL at its discretion and cost, may test additional cylinders to verify the Contractor’s QA/QC documentation.
Mortar. Unless otherwise specified, mortar for brick work shall be composed of 1 part of cement to 6 parts of approved coarse sand, for walls of one brick thick (25cm) and over, and 1 part of cement to 4 parts of approved sand for half brick thick and brick on edge walls. Other specification for mortar in brick work shall be as per I.S. 2250. Mixing should be done in a mechanical pan mixer. If hand mixing is allowed, 10% extra cement over and above the proportion as stated above and mortar shall be prepared on a clean and hard water proof platform and water shall be added only after dry mixing of cement and sand. Mixed mortar shall be used within 1/2 an hour of mixing and partly set mortar should be discarded.
Mortar. Should the mortar perish i.e., become dry, white or powdery through neglect of watering the work shall be pulled down and rebuilt at the contractor’s expense or should the contractor fail to cure the work to the satisfaction of the officer in charge of the work, the later may get the work done at the risk and cost of the contractor. All masonry shall be washed clean on completion and all stains due to lime or other materials shall be removed from the face.
Mortar. 6.1.3.1 (a).
Mortar. For pipe joints and all other parts of the work, one (1) part sulfate resisting Portland cement to two (2) parts clean sand, by volume.
Mortar. 2.2.1.1 Mortar except as noted shall be Type S conforming to CSA A179. Masonry cement shall be used in preference to Portland cement and lime.
