Home.org
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@@ -2,7 +2,7 @@
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** list of current initiatives
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[[file:/bridge.org][bridge project]]
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-
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+[[file:/labs.org][labs]]
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** important links
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[[https://trello.com/invite/b/6ae57ddc7e95199e143391bc/ATTIa38572140a8359a4e6f7c1265fb66675083E3E35/bcit-aci][trello board]]
bridge.org
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@@ -112,4 +112,4 @@ the stress in the steel is
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So we put in way more steel than required,
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since it has a yield strength >250MPa.
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-This tells me that *the bridge would benefit from using fibre reinforcement* to improve the crush strength.
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+whether fibre reinforcement would help is more complicated lol
labs.org
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+* lab #1 mortar
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+mix 2, mortar - no coarse aggregate:
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+what we should have done
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+#+begin_src julia
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+ waterContent=387u"lb/yd^3"
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+ airRatio=2.5/100
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+ wcRatio=0.5
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+ coarseAggRatio=0.5
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+ correctMortarBatch=BatchFromRatios(387u"lb/yd^3", 0.5, 0.0;totalVolume=volume,airRatio=2.5/100)
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+#+end_src
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+
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+
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+#+begin_example
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+batch per 11.939716572159998 L
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+water = 2.7413347473614076 kg
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+cement = 5.482669494722815 kg
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+coarse = 0.0 kg
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+fine = 20.030684304409093 kg
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+total weight = 28.254688546493316 kg
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+total volume = 11.939716572159998 L
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+w/c ratio = 0.5
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+water content per m^3 = 229.59797502676201 kg m^-3
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+#+end_example
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+
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+but i messed up the calculation of fine aggregate and we ended up with
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+#+begin_src julia
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+ incorrectMortarBatch =Batch(
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+ BatchComponent{Water}(2.741u"kg"),
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+ BatchComponent{Cement}(5.48u"kg"),
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+ BatchComponent{Coarse}(0.0u"kg"),
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+ BatchComponent{Fine}(3.3u"kg"),
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+ BatchComponent{Air}(0u"m^3"))
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+#+end_src
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+
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+
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+#+begin_example
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+batch per 5.65925396825397 L
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+water = 2.741 kg
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+cement = 5.48 kg
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+coarse = 0.0 kg
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+fine = 3.3 kg
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+total weight = 11.521 kg
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+total volume = 5.65925396825397 L
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+w/c ratio = 0.5001824817518248
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+water content per m^3 = 484.33945805858076 kg m^-3
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+#+end_example
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+
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+Note that this is about 2x the correct water content!!!
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+learning experience . png
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+
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+added additional 1kg of cement +1.5kg of fine aggregate
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+
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+#+begin_src julia
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+ modifiedMortarBatch = incorrectMortarBatch+BatchComponent{Cement}(1.0u"kg")+BatchComponent{Fine}(1.5u"kg")
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+#+end_src
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+
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+
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+#+begin_example
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+batch per 6.512428571428572 L
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+water = 2.741 kg
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+cement = 6.48 kg
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+coarse = 0.0 kg
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+fine = 4.8 kg
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+total weight = 14.021 kg
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+total volume = 6.512428571428572 L
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+w/c ratio = 0.42299382716049383
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+water content per m^3 = 420.88753372672033 kg m^-3
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+#+end_example
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+
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+we conducted a [[id:4ab637e1-5f86-4b35-b613-1320feafff68][slump test]] -> 165mm = 6.5in
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+which is quite loose, definitely the problem is not enough sand!