Cement and perlite vs. cement and sand
Fleur
16 years ago
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valolson1
16 years agolast modified: 9 years agoRelated Discussions
polymer sand vs beach sand
Comments (12)Not sure why we are bothering with a stale, 10 year old thread but there is a lot of misinformation contained above. Even concrete contractors and manufacturers do not agree on the effect of salt on concrete: "Salt does not damage concrete, but the effects of salt can. That sounds weird, so we’ll explain. Salt does not chemically react with hardened concrete. Salt does however lower the freezing point of water, attract moisture, and increase pressure of frozen water. Salt can also increase the freeze-thaw cycles if the temperature fluctuates between 15°F and 25°F. Concrete scaling can occur in the absence of salts too if there were problems at installation." Chaney Enterprises Washed beach sand should be perfectly acceptable as a paving base material but I would always go with polymeric sand to fill between the paver joints for the reasons marcinde outlined previously....See MoreCement Pots Cracking
Comments (50)I would use a standard hypertufa mix or use premixed concrete (don’t try to make your own unless you are familiar with the chemistry and points of making a good strong mix). Do not get quick Crete like they use for post holes. That works well because it’s in the ground and rain and water keep it damp as it cures. Remember first, concrete never stops curing. It sets up etc and can be used like driveways after at least a week two weeks better. But even then you keep it covered and misted each day — the longer it stays damp (damp not wet in the beginning) the stronger it will be. But the faster you try to dry and cure it, the more cracks, and more brittle it will be. I see people out there doing DIY walks etc and they got fans going cause they want to use that day or the next — and they wonder why it’s cracked, chipping up on the edges, and spalling in a few months. The way I use to do hypertufa (for lightness of weight) or regular concrete if I needed it to stay in place ie wildlife not messing with them - was to make them up, unmold, and then immediately mist, wrap in double layers of heavy plastic and leave sitting in the shade (no sun) for a few days, check it each day and mist it down daily and cover it back up. Do this for 4-5 days. Uncover and let sit in the shade for 6-8 months and mist it down daily .when it rains obviously no need like in the winter. By following spring or summer - put in big tub etc of water and let soak. Change the water every day x 3 or more if you can. Check water with a pH meter. When it reaches around 6-7 you can plant anything you want except for blueberries they want pH around 4-5 I believe. You are trying to neutralize the lime or the pH out of the pot. Concrete is around12-13 (highly alkaline). Even hypertufa is high because it’s peat and concrete but not quite as bad as straight concrete. Peat Moss is about 3-4 pH (very acidic) and it will bring down the concrete some. And this is how we do hypertufa too. But if the pH is still around 8 then you will need to make sure what you put in it can stand that high a pH - not a lot of choices. Remember 7 is neutral, under is acidic, over is alkaline. Roses like 6-6.5, tomatoes 5.5-6, beans like snaps like 6.5-7+ a little. Asparagus like 7 maybe +. Lilacs like higher 6.5-7.5, Cactus can take higher 7+, but there are lots of pH plant charts. Your potting mixes will be acidic based (peat Moss, and bark) but they initially charge all potting mixes with lime to bring them to a general pH. You can contact whoever’s brand you use (look the manufacturer on the internet, they all have customer service)call them up and ask. They will all be different and different mixes within the same manufacturer line may be different if made for different types of plants. A general mix would be 6-6.5 or 5.5-6.5. You can do a media pour-through test - search “media pour thru pH testing) so you know for sure. But the initial lime charge only lasts about 4-6 months depending on how often you water or it rains. You need to resweeten the soil each year — it depends on the size of the pot. Or you can retest with pour through technique to know what the level is. Regular Lime adds calcium, dolomite lime adds magnesium and calcium. If the pH is okay and you want to add calcium - use gypsum. I just know that mine will need it so I add a tablespoons every 6 months for pots 6-10” and up it for larger. If the pot is deep, you will need more or less. For things like tomatoes I add gypsum because they like calcium and you won’t get cat faced or blossom end rot. But back to the pots. I wouldn’t plant in them for at least 6-8 months or at least through your rainy season, and 3-5 days soaking and changing the water daily. If you don’t change the water, you aren’t getting rid of the lime. Check the pH and dilute with water til it reaches 7-7.3 and sprinkle your lawn with the soaking water — it will like the higher pH....See MoreMud float vs cement board and waterproofing
Comments (9)I m a little confused by the description of what each guy is doing. Whatever they do, make sure the floor membrane itself is sloped to the drain. Iy's a code violation to install the membrane flat on teh subfloor with sloped mud on yop of it. "One mud floats the entire shower after pan and cement board are installed." Is this guy floating mud directly on the cement board? Floated walls are typically (at least in my experience) tar paper and then expanded diamond mesh on the walls, with the mesh wrapped through the corners. Then the walls get floated with mud. A tile backing surface like that with mesh wrapped through the corners will not crack on the wall-to-wall corners, so the corners can be grouted. If you're looking to avoid corner cracks, you'll have better success with a fully floated shower that has mesh wrapped through all corners, versus tiling over a lightweight tile backer board like cement board. I do like Shluter's Kerdi membrane, as well as other surface-applied membranes. They can be installed over cement board, and even over a floated mud wall. I think every tiler should want to control the process from studs-to-tile. The tile can only be as good as what it goes over....See MoreHelp with patio. Cement sidewalk, against house, ground on grade
Comments (19)We are planning to eventually build out a deck around the other side of the house, but that won't happen for a while (there is a fire escape in the way. It's an old house, and that's a whole other story...). The lot is only ~50-55' wide at that point (pretty densely packed mostly single-family houses), so I think having too large (especially too wide) of a deck would be weird. The half patio/half deck gives a compromise of more useable space without having the deck as the whole outdoor space and running the width of the yard. Rereading your comment, though, are you suggesting to replace the stoop entirely and build the patio up to the stoop stairs? The two-stage plan would give us house-level decking and ground-level patio....See Morebillie_ann
16 years agolast modified: 9 years agotehuti
16 years agolast modified: 9 years agoFleur
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