- radial
- radial force
- radial stress
- radian
- radian measure
- radius of curvature
- radius of gyration
- radius of inertia
- railway bridge
- rainwater
- raking pile
- raking position
- ramp
- random test
- range of validity
- rapid set
- rapid-hardening cement
- rate of loading
- ratio
- rca – recycled concrete aggregate
- rca, recycled concrete aggregate rc 50
- re-usable
- ready mixed concrete
- ready mixed concrete plant
- ready-mixed concrete
- ready-mixed concrete plant
- rebound hammer
- recess
- recycled
- recycled masonry aggregate
- recycling of concrete
- redistribution
- redistribution of moments
- reduction
- reduction coefficient
- redundancy
- reel
- reference period
- reference return period
- references
- refusal (pile driven to refusal)
- regulation(s)
- reinforce
- reinforced concrete
- reinforcement
- reinforcement area
- reinforcement bar
- reinforcement cage
- reinforcement detector
- reinforcement lay-out
- reinforcement percentage
- reinforcement ratio
- reinforcement splice
- reinforcing bar
- reinforcing steel
- reinforcing wire
- relation
- relationship
- relative humidity
- relaxation
- relaxation loss
- release
- release (a wedge)
- release (tension)
- release agents
- release of prestressing force
- relevant
- reliability
- reliability classes [RC]
- reliability format
- relieve
- repair concrete
- repair concrete by hand application
- repair concrete by injection
- repairing concrete
- representation of actions
- representative value
- required strength
- requirement
- research
- reservoir
- residential concrete building system
- resilient joint
- resistance
- resistance moment
- resistance to freezing
- resistance to lateral- torsional buckling
- resistance welding
- resistances
- resistant
- resolution
- response
- response spectrum
- restrained
- restrained, elastically
- restrained, rigidly
- restraint
- restraint conditions
- restraint of imposed deformations
- resultant
- retain, to
- retaining wall
- retard
- retarding admixture
- retension
- return period
- reverse bend test
- reversible
- rheological
- rib
- rib spacing
- ribbed bar
- ribbed duct
- ribbed floor
- ribbed floor elements
- ribbed slab
- rigid
- rigid joint
- rigid-plastic analysis
- rigidity
- rigidly restrained
- ring beam
- risk acceptance
- risk acceptance criteria
- risk acceptance level
- river gravel
- river sand
- road bridge
- robustness
- rock anchor
- rocker
- rocker bearing
- rod
- rodding
- roll
- roll(er)
- rolled section
- rolled wire
- roller bearing
- roller compacted concrete
- rolling skin
- roof
- roof beam
- roof frame
- roof load(ing)
- roof structure
- roof truss
- rotation
- rotation capacity
- rotation, plastic
- round bar
- round bar, smooth
- round-hole screen
- rounded aggregate
- rubber bearing
- rubber pad
- rule
- rupture
- rust
- rust stains