Masters, please help me translate concrete mix (M20) or 1-1.5-3 using bags of cement. This is what the foreman is familiar with. According to him, sobrang tibay na raw ng 1-2-3 using cement bag volume, not sure if the concrete ratio guide pertains to volume or weight kasi. Thanks.
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What's the concrete strength required? 3000psi? Stick w/ 1:2:3 by volume & keep water content at a minimum. The amount of water used to mix is a vital factor in determining the final strength of concrete. Use the least to get a workable mix.
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iba talaga pag engineer. Ang dami kailangan pag-aralan na sukat at bigat. Calculado talaga. Bakit pag licensure exam eh ang foucs puro sa mga attorney. Di ba dapat sa mga engineer kasi sila kumakalkula ng buidlings.
20Mpa is a tad under 3000psi. The 1:2:3 mix will yield above that if controlled well. Note that plant-batched concrete will be more precisely portioned by weight. For DIY mixes, it might be a challenge to do mass portioning, hence, volume is tolerated. To check mix & moisture content consistency, do the slump test.
Concrete Slump Test - Tutorial - YouTube
You may devise your own version of the 12" test cone. The lesser the slump, the stronger the yield.
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For 1:2:3 workable mix you can get 4000-5000 psi. You can try 1:3:4 for 3000-3500psi. Sometimes on sacks method not all are filled equally. Like what trav said water is a major factor for concrete strength.
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Won't that consistency be difficult to manage if I don't have a concrete vibrator?
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It's not just recommended but required, sir. Drier, stronger mixes won't flow well. The proper way to prevent air bubbles, voids & honeycomb is thru proper vibration. It's even wise to keep a spare ready upon pouring as vibrator failures can be quite common.
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At a nearby house under construction, the engr told me she was using 1:4:6 for structural citing the sacks don't really get filled, but I think that would be more like 1:3:5. Just thinking that maybe if I do 1:2:4, then that would be more like 1:1.5:3?
Actually gusto no foreman equal parts sand and gravel para daw iwas voids sa column, ano kaya effect nito sa strength?
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No apologies needed Sir, I am very grateful for receiving valuable advise from the Masters [emoji4]
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Guys what's the best way to anchor wooden baluster railing to tiled stairs? The stair tiles are outdoor finish porcelain types.
Original plan was to have stainless steel railing but I'm trying to save a bundle by using wood.