What is which, why, where, when and how?

What is the minimum and maximum.
Which is the highest and the lowest?

As per ASTM C 129 – 03: Standard Specification for Nonloadbearing Concrete Masonry Units: Weight Classification of structures are as follows:
Weight Classification                                  Oven-Dry Weight of Concrete, lb/ft3 (kg/m3)

Lightweight                                                  Less than 105 (1680) 
Medium Weight                                           105 to less than 125 (1680 to 2000) 
Normal Weight                                            125 (2000) or more

Low Slopes: Roof pitches less than 4/12 are considered low sloped roofs. Special installation practices must be used on roofs sloped 2/12-4/12. Shingles can not be installed at slopes less than 2/12.

Recommended slope for wet areas like bath room, showers, toilet rooms, etc shall be 6mm down in 1 feet.

Minimum requirement of steel in RCC structures:

Grain size : Grain size (granularity) shall be based on the size of the largest particles that are dispersed in sufficient quantity to influence the texture of the coating system. As per EN 1062, grain sizes (in the coatings) are classified as follows:

For the determination in accordance with ISO 787-7 and EN ISO 787-18 in the case of solvent-dilutable systems, a suitable solvent may be used in order to pour the dispersion through the sieve.

What is the standard size of cement measuring box?

12″ X 12″ x 15“ = 0.3 X 0.3 X 0.375 = 0.03375 Cmtr = 33.75

Another thing used to measure the cement is PAN:

1 bag of 50 Kg cement (0.03475 Cmtr = 4 pan X 0.86775 Cmtr.

What is good air and bad air?

Compression & tensile strength of brick, granite, lime stone, cement, concrete, sand stone, slate and trap rock:

Ref: https://themasonrystore.com/blogs/cold-hard-tuckin-faqs/choosing-the-proper-mortar-for-any-masonry-application-and-then-where-to-buy-it


Grading of natural and M-sand for cement mortar:

Some abbreviations: 

EPI - Ethoxylated Polyethy Iemine (for potable (portable also) grade metal water tanker coating)
MMRE - Malcic Modified Resin Esters (coating / paint for bitumen and concrete roads for line marking)
1 Megaohms = 1MO = 10^6O = 1,00,00,00O
IEQ - Indoor Environment Quality - Credit 4.1
OSHA - Occupational Safety & Health Act
PMMA - Polymer Methyl Meth Acrylate (Acrylic / Acrylic glass, flooring, coating are available)
WELL - 3rd party certificate by GBCI - Green Building Certification Inc.
GGBS - Ground Granulated Blast Slag (used in concrete in modern technology)
GRIHA - Green Rating for Integrated Habit Assessment
PVA - Dilute Poly Vinyl Actate (used to install the mesh at back of Glass mossaic tiles and some stones.
MPa - Mega Pascal = N/mm^2
HACCP - Hazard Analysis & Critical Control Points - Need for PU Flooring
PVC - Poly Vinyl Chloride
IPN / PU - Interpenetrating Polymer Network - A thickness gradient interpenetrating polymer network (IPN) was easily created that takes advantage of the relatively poor compatibility and curing rates discrepancy between epoxy (EP) and polyurethane (PU).
ESD - Electro Static Discharge
OWSAS - International Occupational Health & Safety Management. System Specification.
EHS - Environmental Healthy & Safety (it's a certification)
LEED - Leadership in Energy & Environmental Design.
MDI - Methyl Diphenyl Diisocyanate - is a chemical used in the production of polyurethanes for many applications. MDI is used primarily in the production of rigid polyurethane foams used for insulation for your home or refrigerator, and many other uses.
EPDM - Ethylene Propylene Diene Monomer
SBS - Styrene-Butadiene-Styrene
SBR - Styrene-Butadiene-Rubber

VOC - Volatile Organic Content

Poly Olefin based polymer systems:

• App - Atactic Poly Propylene
• APAO - Amorphous Poly Alpha Olefins
• TPO - Thermo Plastic Olefin - membranes
• IPP - Isotactic Poly Polypropylene - Sheet membranes

HAP - Hazardous air pollutants, also known as TAP - Toxic Air Pollutants or air toxics, are those pollutants that are known or suspected to cause cancer or other serious health effects, such as reproductive effects or birth defects, or adverse environmental effects. as listed in Section 112 of the U.S. Clean Air Act (1970) and Clean Air Act (1990). The list can be found on Wikipedia at National Emissions Standards for Hazardous Air Pollutants, and on EPA.  Many air pollutants can be called as follows:

C = 

• ► Carbon monoxide‎ 
• ► Chlorine‎ 
• ► Cyanides‎ 
• G = 

• ► Glycol ethers‎ 
• P

• ► Polycyclic aromatic hydrocarbons‎ 

Which surface can hold how much load:

1. Concrete- Mechanically prepared to provide a roughened porous solid surface - 60 kg/m²
2. Sand/Cement Render - Applied to solid open porous roughened concrete, brick, or masonry surface. 32 kg/m²
3. Paper-faced plasterboard generic, Gyprock plasterboard - 32 kg/m² (Remove wallpaper, vinyl and paint finishes)
4. Gyprock Aquachek Sheet fixing @ 200mm centres (with/without Waterproof membrane) -12.5 kg/m²
5. Gyprock Aquachek Sheet fixing @ 100mm centres (with/without Waterproof membrane) - 32 kg/m²
6. Fibre Cement Wallboard# Sheet fixing @ 200mm centres - 20 kg/m²
7. Fibre Cement Wallboard# Sheet fixing @ 100mm centres - 32 kg/m²
8. Fibre Cement sheets for External Facades^ 
1. James Hardie EasyLap BGC – 50kg/m2
2. Innova Stonesheet - 40kg/m2
9. Gypsum Plaster can support a maximum weight of 20kg/m²
10. Gypsum Plasterboard direct can support a maximum weight of 32kg/m².
11. Wood based sheet can support 30 Kg/m2.
12. Foam cored tile backing boards and fiber cement boards can support 60 Kg/m2
13. Gypsum fiber boards can support approx. 35-40 Kg/m2.
14. Masonry and blockwork (May require rendering prior to the installation of tiling - refer to AS 3958.1 – 2007, Section 4.5 refer to sand/cement render). 32 kg/m²
15. Hebel Block Walls/Hebel Wall Panels 32kg/m² max. (Internal walls only. No additional mechanical fixings to be used)

This will be kept updating as on when the details I come across....

Let me know your comments below...