ASTM C398

Abstract

This practice provides recommendations for use of hydraulic cement mortars for chemical-resistant masonry construction. For Portland and Portland blast-furnace slag cements, no calcium aluminate cement, lime, or admixture shall be mixed with these cements, in the mortar batch or in the mixing water. On the other hand, no Portland or Portland blast-furnace slag cements, lime, or admixture shall be mixed with calcium aluminate cement, in the mortar batch or in the mixing water. The brick shall be clean and protected from frost damage. Materials proportions shall be in accordance with the requirements indicated in this standard practice. The mixing water shall be approximately neutral and shall be potable. During the preparation of concrete fill or sub-base in new construction, the surface of the concrete fill shall be free of mortar drippings and projecting joints. Acceptable surface texture requirement is indicated in this standard practice. All dirt, dust, loose particles, surface laitance, and debris shall be removed from the concrete fill or sub-base by vigorous brooming, vacuuming, or other means. The surface must be free of grease, oil, or wax deposits. Wood or metal strips shall be used to gage the thickness of the setting bed. Several hours before placing the setting bed, the prepared concrete surface shall be thoroughly saturated with clean water. When required, the expansion joint strips shall be located and set in position. All equipment shall be clean and free of other cement, lime, and plaster, prior to mixing and placing setting bed. Grouting shall be done as soon as possible after the initial set has taken place in the setting bed. It is essential that hydraulic cement mortar or grout joints be properly cured to ensure maximum retention of the mixing water.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This practice provides recommendations for use of hydraulic cement mortars for chemical-resistant masonry construction.

1.2 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.

1.3 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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.