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Topic: Mortar (masonry)

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	Articles from ebuild.com \| Mortar and Masonry : Understanding mortar and its propertiesArticles from ebuild.com \|
		Mortar is the material that binds masonry units and binds joint reinforcement and connectors to the units.
		Mortar's compressive strength has significantly less influence on the compressive strength of the masonry assembly than does the compressive strength of the masonry units.
		Within each mortar type, any of the three categories of cementitious materials (Portland cement, These properties are evaluated on a laboratory-prepared mix of mortar, which differs from the field mortar mix in that the amount of water added to the laboratory mix is limited and is based on a standardized measurement of flow.
	www.ebuild.com /articles/article.hwx/Q/articleId.62753 (0 words)

	Mortar (masonry) - Search Results - MSN Encarta
		Mortar (masonry), mixture of lime or cement with sand and water, used as a binding material for bricks and stone and as a plaster.
		Mortar is a material used in masonry to fill the gaps between blocks in construction.
		Mortar Net and Weep Vent were invented by a masonry restoration contractor to address an all to common problem- unmanaged moisture migration.
	encarta.msn.com /Mortar_(masonry).html (234 words)

	The Northwest Masonry Guide (Site not responding. Last check: 2007-10-26)
		Masonry mortar is composed of one or more cementitious materials, clean, well-graded masonry sand, and sufficient water to produce a plastic, workable mixture.
		Mortar of good workability should spread easily on the masonry unit, cling to vertical surfaces, extrude readily from joints without dropping or smearing, and permit easy positioning of the unit without subsequent shifting due to its weight or the weight of successive courses.
		A mortar that has good water retentivity remains soft and plastic long enough for the masonry units to be carefully aligned, leveled, plumbed, and adjusted to proper line without danger of breaking the intimate contact or bond between the mortar and the units.
	www.masonryinstitute.com /guide/part3/systems_b2_pg1.html (991 words)

	Masonry Technical Library - Mortar Retentivity
		Other mortar characteristics that influence general performance, such as aggregate grading, water retentivity, and flow, can be accurately measured by laboratory tests and are included in ASTM Standards.
		It is the mortar's ability to retain its plasticity in contact with absorptive masonry so that the mason can carefully align and level the units without breaking the bond.
		Mortar that is not used within 2.5 hours or that has begun to set should be discarded.
	www.maconline.org /tech/materials/mortar/retentivity/retentivity.html (432 words)

	The Northwest Masonry Guide - Glossary of Masonry Terminology (Site not responding. Last check: 2007-10-26)
		Masonry fireplace is a heart and chamber of solid masonry units such as bricks, stones, masonry units provided with a suitable chimney.
		Mortar for masonry should have a flow of between 135% and 145% at time of use.
		Masonry units of shallow thickness used to finish the interior surface of a wall to provide space for insulation, to prevent moisture transmittance, or to provide a smooth or plane surface for finishing.
	www.masonryinstitute.com /guide/glossary/glossary_f.html (908 words)

	Section 4065 Masonry Mortar
		Aggregate to be selected to match the color and texture of the original mortar aggregates as closely as possible while remaining in compliance with ASTM C144 grading and soundness requirements.
		D. Mortar Colors: Inorganic mineral oxides meeting the requirements of ASTM C797, at levels not to exceed 10% on cement weight, except for carbon fl, which may not exceed 2% on cement weight.
		Masonry surfaces should be saturated but free of excess or standing water at time of mortar placement.
	www.edisoncoatings.com /html/4065spec/4065spec.htm (1309 words)

	Masonry Magazine: Mixing Mortar
		Mortar must be strong, durable, and capable of keeping the wall intact; it must help to create a water resistant barrier; and it must accommodate dimensional variations and physical properties of the brick when laid.
		Masonry cement is Portland cement with many different additives in it such as bonding agents, set controllers, water repellants, air-entraining agents, and inert fillers.
		To obtain optimal bond, use a mortar with properties that are compatible with the masonry units to be used.' After the initial rate of absorption (IRA) on a particular unit is determined, the mason can decide which mortar best suits the needs of the project.
	www.masonrymagazine.com /9-02/mixing.html (0 words)

	PCA - Masonry
		The masonry sample panel or mockup is an important means of establishing agreement between purchaser and provider on what is expected and what is achievable [see “Masonry Walls and the Importance of Mockups”].
		Since pigments, due to their high fineness, are easily concentrated on the surface of a mortar joint by tooling, the appearance of colored mortar joints is especially sensitive to the tooling technique used in finishing the mortar joint.
		Masonry is a handcrafted material and it is affected by constituent materials, weather conditions, and construction practices.
	www.cement.org /masonry/cc_fn_mortar_color.asp (677 words)

	Master Masonry: Tech Notes
		Tuckpoint - (1) to point masonry with a flush mortar joint that approximates the color of the masonry units and a mortar of contrasting color that is shaped into a thin strip.
		Portland cement was used in mortars in the latter part of the nineteenth Century with a resulting change in the character of brickwork.
		As a general principle, the mortar should be slightly weaker than the brick to allow the wall to ‘breathe’ and for moisture to evaporate through the joints and to discourage excessive moisture loss through the face of the brick – which would accelerate the rate of decay.
	www.mastermasonry.com /Technotes.htm (3315 words)

	Masonry Components - Mortar
		Hydrated lime: contributes to mortar's workability, water retentivity, and elasticity.
		Mortar sand: acts as a filler and contributes to strength.
		Masonry assembly strength in shear and bending is a function of bond strength.
	www.nau.edu /otle/projects/larson/egr437/class/masonry/components/mortars.html (370 words)

	WBDG: Masonry Wall Systems
		The units are laid in mortar to various heights, with the strength of the assembly being achieved during curing of the mortar.
		Mortar proportions and mixing requirements are outlined in ASTM C270 and in the appropriate Technical Notes published by the Brick Institute of America (BIA).
		Repointing of the mortar joints in exterior masonry is typically required between 20 to 30 years after installation, depending on the type and quality of the original masonry installation.
	www.wbdg.org /design/env_wall_masonry.php (2895 words)

	Build Masonry Fireboxes
		Masonry fireboxes are often laid in ordinary Portland cement mortar, sometimes with a little extra cement in it or perhaps with some fire-clay added to make it "fire-clay mortar".
		The BOCA code required "medium- duty fire-clay mortar, the UBC just required that the "joints in firebrick shall not exceed 1/4 inch." and the CABO One and Two Family Dwelling Code did not specify the type of mortar or size of joint to be used.
		Refractory mortar, on the other hand, is made with high temperature cements and carefully selected aggregates that don't expand and tear the mortar apart when heated.
	www.rumford.com /articleRefmortar.html (1005 words)

	How do I maintain my home's masonry? (Site not responding. Last check: 2007-10-26)
		Masonry is made up of a number of items including brick, stone, terra cotta, concrete, stucco, tile, and mortar.
		Masonry is used on cornices, pediments, lintels, sills, and decorative features, as well as for wall surfaces.
		Respect and retain, where possible, all masonry elements that are important in defining the overall character of the building.
	www.grassroots.ca /homeowner_help_articles/masonry_maintenance_v2.html (682 words)

	Masonry Basics - The Tools You Need and How to Use Them.
		Once the trowel is loaded, you must settle the mortar on the trowel by snapping your wrist.
		Mortar boxes are usually made of heavy gauge plastic or steel.
		Once the mortar is mixed, transfer the mortar to a mortar board or hawk, from which you will work when applying the mortar.
	www.masonryforlife.com /HowToBasics.htm (1714 words)

	Silicone Sealants, Mortar & Cement
		Greatly improved adhesion to masonry makes 600 RTV Silicone Sealant the ideal choice for pointing masonry.
		An exterior silicate cement for repairing broken mortar in chimneys.
		Multi-purpose cements for bonding and sealing both masonry and metals with working temperatures up to 2000° F. Designed for patching or repairing cracked or chipped firebrick and mortar.
	www.gascoals.net /Accessories/RutlandHeatSafe/SiliconeSealantsMortarCement/tabid/927/Default.aspx (0 words)

	TN 39 Revised – TESTING FOR EGNINEERED BRICK MASONRY-BRICK AND MORTAR
		Abstract: Testing of brick, mortar and grout is often required prior to and during construction of engineered brick masonry projects.
		The use of engineered brick masonry in the construction of loadbearing structures requires that the standard methods for determining the physical properties of both the materials and the masonry assemblages be strictly followed.
		The tests are performed on mortar samples which are prepared in the laboratory.
	www.bia.org /BIA/technotes/t39.htm (3861 words)

	Virginia Masonry Association
		Masonry cements are manufactured in a cement plant using portland clinker, plasticizers, and an air entraining agent all interground together.
		Both masonry cement mortars and P/L blend mortars have the capability of providing for water permeance, given they are used effectively by the mason.
		Just remember, the key to having a successful masonry project, is a well qualified mason on the job who is comfortable with the product he is using, not which type of mortar the designer specifies for the project.
	www.virginiamasonry.org /prod_portland.html (1149 words)

	Preservation Brief 2: Repointing Mortar Joints in Historic Masonry Buildings
		Mortars for repointing should be softer or more permeable than the masonry units and no harder or more impermeable than the historic mortar to prevent damage to the masonry units.
		Historically, mortar acted as a bedding material--not unlike an expansion joint--rather than a "glue" for the masonry units, and moisture was able to migrate through the mortar joints rather than the masonry units.
		Mortar made with lime putty and sand, sometimes referred to as roughage or course stuff, should be measured by volume, and may require slightly different proportions from those used with hydrated lime.
	www.cr.nps.gov /hps/tps/briefs/brief02.htm (9375 words)

	Abstract Masonry - Experts at Cleaning, Repairing, and Preserving Historic Masonry
		Repointing is the process of carefully removing deteriorated mortar from the joints of a masonry wall, and replacing it with new mortar that has been intelligently formulated.
		Because the mortar between this stone is missing, it provides a direct avenue for water and its damaging effects.
		Control suction (the rapid transfer of water from the wet mortar into the masonry) as you are inserting the new repointing mortar in the joints.
	www.masonry-restoration.com /repointing.htm (735 words)

	Davis Colors™: 04200 Masonry Architect Specs
		Use a mortar color which matches or compliments the masonry units to add to the beauty of a brick or block wall.
		Note, however, that an exact color match of concrete masonry unit and mortar with work specified in other sections may not be practical because of differences in various manufacturing and construction processes; make final color selections on basis of product samples or mock-ups.
		Colored CMU and mortar are installed in a much the same manner as uncolored masonry and mortar.
	www.daviscolors.com /tech/04200.html (1694 words)

	Home of the Mortar Industry Association
		1 Factory-produced lime:sand mortar for masonry 128 KB
		2 Factory-produced ready-to-use mortar for masonry 132 KB
		3 Factory-produced silo mortar for masonry 132 KB
	www.mortar.org.uk /resources02.htm (148 words)

	Mortar
		It is critical to appreciate mortar's properties and how the ingredients in mortar affect performance.
		Getting mortar into a thin joint between already-placed units can be a difficult, messy and expensive operation.
		Mortar materials were portland cement/lime, mortar cement and masonry cement.
	www.maconline.org /tech/materials/mortar/mortar.html (316 words)

	Masonry: Verifying Mortar Proportions \| Portland Cement Association (PCA)
		It is contained in Annex 4 of ASTM C 780, Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry.
		Fresh mortar is sampled at the mixer and placed into jars of alcohol to suspend hydration.
		Fresh mortar is wet-sieved to determine relative amounts of sand and cement.
	www.cement.org /masonry/mortar_proportions.asp (425 words)

	Repointing Historic Masonry - Oldhouseweb.com (Site not responding. Last check: 2007-10-26)
		The mortar bedded between the bricks and stones of your home is traditionally lime-based mortar.
		Even then, it was mostly used as an additive to the mortar mixture and was not a primary ingredient in mortars until around 1930.
		For repointing old masonry, you'll need limestone that was burned in a kiln to create "quicklime." The quicklime is then "slaked" with water to create lime putty, typically sold wet, in sealed buckets.
	www.oldhouseweb.com /stories/Detailed/15028.shtml (694 words)

	Masonry and Concrete Adhesives (Site not responding. Last check: 2007-10-26)
		Masonry adhesives are premixed and available in several packaging formats, from caulk tubes and squeeze bottles to pressurized bulk containers.
		Masonry adhesives would be used in lieu of masonry mortar.
		Because it is applied in a bead smaller than the traditional 3/8" mortar bed, leveling the blocks might pose a challenge to the mason, initially.
	www.toolbase.org /Technology-Inventory/Foundations/masonry-concrete-adhesives (467 words)

	Phinney Neighborhood Association - Well Home Articles - Masonry and Mortar
		The tip of the trowel is used to create a furrow in the mortar in preparation for the first course of bricks.
		As the work continues, excess mortar is pulled away from the joint with the trowel in a way which avoids smearing it on the face of the bricks.
		He wants us all to keep our masonry in good repair, in part to make it harder for vandals to throw bricks at a system that is always expected to do more than is possible with the resources that are provided.
	www.phinneycenter.org /programs/wh_articles/MasonryAndMortar.html (955 words)

	Mortar Colors Add Mixes
		Mortamix® Type N masonry* cement is ideally suited for use in masonry mortars for brick, block, tile, and stone.Mortamix® Type S masonry* cement is ideal for mortar and stucco applications requiring compressive and tensile strength with excellent water repellency and low volume change.
		Mortamix® Type M masonry* cement is well suited for masonry jobs where maximum strength is required.
		The SGS "A", "H" and "X" Series Masonry Colors are uniformly controlled pre-measured units of color.
	www.buildingtradesdir.com /products/Masonry/Mortar_Colors__Add_Mixes/mortar_colors_add_mixes.html (535 words)

	05/21/2003 - Written notification of ASTM strength test for mortar in masonry piers/walls prior to steel erection.
		Re: Requirement in 29 CFR 1926.752 for steel erector to obtain written notification of strength test for mortar in masonry piers/walls prior to steel erection.
		The concrete in the footings, piers and walls and the mortar in the masonry piers and walls has attained, on the basis of an appropriate ASTM standard test method of field-cured samples, either 75 percent of the intended minimum compressive design strength or sufficient strength to support the loads imposed during steel erection.
		Likewise, OSHA will not enforce the requirement in §1926.752(b) prohibiting the erector from beginning steel erection until receiving that mortar strength notification or until such time as the Agency is able to define an appropriate substitute or until an appropriate ASTM test method is developed.
	www.osha.gov /pls/oshaweb/owadisp.show_document?p_table=INTERPRETATIONS&p_id=24538 (677 words)

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