Concrete block of 150 x 150 mm sq of Grade M20 is suppose to have compressive strength of 20MPa but this practical video shows it has a strength of 400 Kg/cm sq i.e approximately 40MPa which is quiet impressive.
Please i just want to understand the last statement before taken the concrete cube specimen out of water talking about 24 hours before testing. I need to understand that lines of stament. Thanks.
40 mpa is target strength decide for perticular characteristic strenght .. if there happens to be bad workmanship , high w/c ratio will least get 20 mpa
Thank you. that was a great info. ignore those repeater id*ots saying about safety wherein this is just a very small scale experiment. Dirty hands are sign of good labor anyway.
raughn jeraiah medel I’m here 4 years later wondering if the operatives still have skin on their hands or has it been gradually burned away by raw cement ?? Just a thought.
which equipment is used to compact the concrete filled in moulds? what is the ideal weight/area in kg/cm^2 for M45, M30, M15 grade concrete respectively? How much load is being applied per cm to the concrete cubes surface if a manual, lever arm operated Compression Testing machine is used? In automatic Compression Testing Machine, as mentioned by you, the load transfer rate is 140 tonnes per cm. Please correct me if I am wrong. Also if the mixture is taken according to 3 moulds quantitatively, then if the readings aren't 15 plus or minus of each other, the whole mixing process has to be done again?
Megapascal and N/mm^2. and total weight handling and time duration ka ek mix graph kya hoga Tensile strength key saath youngs modules Yani sab formula ka ek corresponding correlation nikalo Ya sabko mix karkey ek maha formula banao to hum theory of evolution everything ki taraf badleingey 🕉🕉🕉🕉
11:10. ....How it's come 90 ×1000. As A force ??? How 90??😢😢😢 .? Don't get a shortcut please.. explain how it's come to ????? Plz explain in reply .. brother🙏🤗
@@Er-NileshGaikwad no no, 90 ton is the load which made concrete cube to rupture... that means concrete cube have ability to withsatnd 90 tons per cm square... and 1000 is multiply to change ton in kg.
In real case is sample to be collected from Construction Site during its construction (i.e slab)or 1st we prepare in lab then after we get results we start in real construction filed? simply testing is done in lab before construction or during the day of construction sample is taken to lab?
Goodday sir , I'm watching from Guyana and began this lab an having some problem with the satisfactory or unsatisfactory failure.DO not know how to identified them?
Zhen kaywen to control the curing of the concrete. If it cures too fast, the concrete gets too hot from the exothermic reaction inside and can crack...
