G15
A lower strength class, often requested where the concrete is not acting as the structural element.
- Blinding under footings and ground slabs
- Lean mix and mass fill
- Bedding and non-structural work
Ready-mix
Concrete, batched and delivered to the site.
Ready-mix arrives in a mixer truck, already proportioned. You tell T3 the grade or the job, the volume, and where to discharge it. The team confirms what can be supplied.
The number in a grade such as G30 is commonly treated as the strength class in N/mm². That is industry naming, not a T3 test result. Your engineer specifies the grade. T3 confirms what can be supplied when quoting. This page is not an engineering design.
Grades
G20
A light structural or general-purpose class, used when the drawing or the site practice names G20.
- Simple domestic ground work
- Blinding where a higher class than G15 is specified
- Paths and pads named as G20 by the designer
G25
A common request for smaller buildings when the engineer has specified G25.
- House ground slabs shown as G25
- Strip footings on domestic jobs
- General concrete where the specification says G25
G30
A frequently requested structural class for members the engineer has designed at G30.
- Suspended slabs, beams, and columns when specified
- Commercial floors designed at G30
- Structural pours where G30 is written on the drawing
G35
A higher structural class for elements the specification steps up above G30.
- Heavier beams, columns, and slabs
- Sites where the drawing calls for G35
- Work that should not be substituted with a lower grade
G40
A higher-strength class for elements designed at G40. Suitability comes from the specification, not from this page.
- Structural members specified as G40
- Higher-load elements on the drawing
- Jobs where a lower grade would not match the design
Mix types
The mix changes how the concrete is placed. If you are unsure, say so on the quotation form and describe the access.
Normal mix
Usually discharged by chute when the truck can get close to the pour.
Pump mix
A more workable mix requested when a boom or line pump has to place the concrete.
Not sure
Describe how the truck will reach the pour. T3 can ask the right follow-up question before quoting.