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OTHER MORTAR OPTIONS Recently, preblended mortars have been designed specifically for use with stone veneers. The type S gives a more structural capability necessary for a tall wall. This mortar mix has a medium compressive strength and consists of 1 part Portland cement, 1 part lime, and 6 parts sand. It's not noticeable but wondering about long term if I should get this repaired, water damage and bugs? Sorry about that. To prevent further spalling, treat the concrete with a bitumen undercoat and then paint over with a reinforced emulsion. The mortar that I used to permanently attach the brick and stone to my patios did not contain any hydrated lime. I would try a test mix to get the best results but 2 Portland,1 lime, 9 sand is a good starting point. Both Mortar and Concrete is made with a mix of sand and cement, with Concrete also containing coarse aggregate (small stones) for extra strength. Neither I nor any of the advisor/consultants associated with this site will have liability for loss, damage, or injury, resulting from the use of any information found on this, or any other page at this site. Kelly Hart, Hartworks LLC. Other aspects, such as the type of brick or stone, or the sand being used will affect the final mix. For foundations, a mix of 1 part cement to 3 parts sand to 6 parts aggregates can be used. Additives to increase or decrease setting times or to help reduce the damage from frost are often also added to the mix. rlrefalo | Posted in Construction Techniques on January 24, 2008 06:30am Hey Guys, I need to repoint the stone foundation in some spots. A: (Kelly) The butter mortar (a standard wet mortar) contains sufficient moisture to initiate hydration (hardening) of the dry mix brushed in to top up the joint, and, as long as the dry mix is properly pressed down into the joint and the butter mortar, a reasonable joint can be achieved. What do you think? Your DIY Safety Kit should, at the very least, Include Gloves, Goggles, and a Mask. External concrete is prone to spalling. Mix one part cement to 4 parts soft sand. You will need a masonry cement, type N for this particular application. Mortar is also used for finishing a face of wall, ceiling or any other uneven surface of construction work. The ratio to mix mortar is historically accepted as 1:3 of sand and cement. Portland Cement may be partially replaced by another cementitious material such as Fly Ash (a by-product of coal-fired electricity generation), various types of sand can be used, aggregates can be a variety of materials and sizes, but the four components remain essentially the same. I read an article which said that mortar used with stone should use lime in order to ensure that subsequent (inevitable) movement is absorbed by the mortar rather than the stone. Sharp Sand (which has larger grains) is used for concreting or laying paving slabs and Soft Sand is used for bricklaying, etc. In essence, four parts (or five) of sand are added to one part of cement, and then water is added to that until you achieve the texture you want for your particular block project. Natural stone is often laid in a "dry stack" style without any mortar, but mortar stabilizes the stones to keep them from falling off the wall. You may have to lay a narrow footer to support the rock depending on the weight and thickness of the stone. The wall is only about 30 inches tall. A mate has suggested 5:1:1 of builder's sand, lime and cement. In terms of the ratio for concrete, it depends on what strength you are trying to achieve, but as a general guide a standard concrete mix would be 1 part cement to 2 parts sand to 4 parts aggregates. I live in San Antonio, Texas with hot summers and mild winters. How to Mix Mortar. Q: Is there anything else that is important to this type of wall or is there a better way I should be going? A 3 to 1 mix is appropriate. A: Portland cement is not the way to go for such an application. Generally there should be no or very little lime in a stone wall. He has built foundations out of stone and mortar and put rock veneer around the base of a straw bale building to raise the level of waterproofing. I also like to make sure my mix is right. You might also want to use a masonry glue in the mortar to compensate for lack of experience at getting the mud right. As for the mortar the lime content should not be important for the lifetime, but you can add a bit for better workability. This helps to keep the mix free from stones or dirt on the floor, and also avoids leaving a concrete stain. Q: But adding hydrated lime to the mortar mix can be very beneficial. Is mixed by first adding a portion of the sand being used will affect the mix. 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