The 's' stands for 'slump'. How wet the concrete is. S1 is prity dry (for laying kerb stones). S2 is wet (for foundations). S3 is very wet (pump mixes).
Regards
Colin, a Tarmac concrete batcher.
2nd Answer:
It should be noted that the concrete should be as dry as practical to enable it to attain the highest potential strength.
Concrete should never be so wet that it flows into the forms like tomato soup. In foundations in particular, you want the best strength you can get, as the entire structure will apply force to them. It should take some handwork with shovels to "ker-chunk" the concrete into the nooks and crannies of the forms. For vertical forms, using a 'stinger' or vibratory device is preferred to settle the concrete into all the nooks and crannies.
A 4" slump is about as wet as you want the concrete mix to be. If you pick up a handful (with gloves) of fresh concrete and mold it into a fat cigar shape, it should hold that shape when you open your fingers. When the concrete mix comes down the chute of the delivery truck, it should stand up on the ground in a little hill, but with some spreading out, too.
For all but the dry structural concretes, you can increase the fresh concrete's slump (wetter) by adding 1 gallon of water for each cubic yard of concrete for each additional inch of slump desired.
Green concrete could mean two different things. It could mean that the concrete isn't cured yet, or it could mean that it is supposed to be environmentally friendly.
Asphalt Concrete
0.2 cm/s to 1.2 cm/s as per crouch, 2004
They're talking about compressive strength - the amount of force that can be applied to a defined area of the concrete before it fails. 25 MPa concrete in the states would be 3625 psi concrete - very ordinary stuff; the kind in bags at Home Depot is stronger than that.
cement fine aggregates and course aggregates and water for the hydration of cement are the main component of plain cement concrete. and for RCC M-S bars are used with these component.
A. N. Talbot has written: 'Tests of reinforced concrete beams: resistance to web stresses' -- subject(s): Reinforced concrete 'Tests of concrete' -- subject(s): Concrete 'Tests of concrete and reinforced concrete columns' -- subject(s): Reinforced concrete, Concrete, Columns, Concrete, Concrete construction, Concrete Columns 'The railway transition spiral' -- subject(s): Railroads, Curves and turnouts 'Tests of cast-iron and reinforced concrete culvert pipe' -- subject(s): Pipe, Testing 'Reinforced concrete wall footings and column footings' -- subject(s): Reinforced concrete, Foundations 'Tests of columns' -- subject(s): Accessible book, Columns, Iron and steel, Iron and steel Columns, Reinforced concrete 'The strength of concrete' -- subject(s): Reinforced concrete 'Tests of timber beams' -- subject(s): Girders
Duff Andrew Abrams has written: 'Quantities of materials for concrete' -- subject(s): Concrete, Tables 'Effect of curing condition on the wear and strength of concrete' -- subject(s): Concrete 'Tests of bond between concrete and steel' -- subject(s): Reinforced concrete 'Effect of vibration jigging and pressure on fresh concrete' -- subject(s): Concrete 'Test of a 40-foot reinforced concrete highway bridge' -- subject(s): Bridges
John George Richardson has written: 'Formwork notebook' -- subject(s): Formwork, Concrete construction 'Concrete Craft Notebook' 'Concrete notebook' -- subject(s): Concrete construction 'Supervision of concrete construction' -- subject(s): Engineering, Management, Concrete construction
A. K. Tovey has written: 'In situ concrete building speeds to completion' 'Concrete masonry for the contractor' -- subject(s): Concrete blocks 'Model specification for concrete masonry' -- subject(s): Standards, Concrete blocks, Concrete construction
newton mean in concrete it is used for bearing for exemple mark
Green concrete could mean two different things. It could mean that the concrete isn't cured yet, or it could mean that it is supposed to be environmentally friendly.
G. S. Davies has written: 'St. Paul in Greece' -- subject- s -: Journeys
refractory Concrete means refractory castable == ==
American Concrete Institute. has written: 'Guide for concrete inspection' -- subject(s): Concrete, Quality control, Inspection
L. J. Mensch has written: 'Architects' and engineers' hand-book of reinforced concrete constructions ..' -- subject(s): Concrete 'The reinforced concrete pocket book' -- subject(s): Reinforced concrete
D. D. Higgins has written: 'Repairs to concrete affected by reinforcement corrosion' -- subject(s): Reinforced concrete, Corrosion 'Efflorescence on concrete' -- subject(s): Surfaces, Concrete, Efflorescence, Defects
I believe you mean the ceiling, which is concrete.