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View article: CO2 Reductions Utilising Self-Stressing Steel Fibre Reinforced Concrete
CO2 Reductions Utilising Self-Stressing Steel Fibre Reinforced Concrete Open
A novel system utilising steel-fibre reinforced concrete (SFRSSC) has been developed and implemented in projects in the recent years for structures such as ground-based slabs and ground-level elevated slabs on piles among others. Being tha…
View article: Effect of Set Accelerator on Capillary Suction and Porosity of Concrete – Cast Samples with Constant Water/Binder Ratio
Effect of Set Accelerator on Capillary Suction and Porosity of Concrete – Cast Samples with Constant Water/Binder Ratio Open
Alkali-free set accelerators are added at the nozzle to ensure rapid set of wet sprayed concrete. The accelerator affects the strength development, porosity and transport properties, and hence the durability, of the sprayed concrete. We de…
View article: Effect of Set Accelerator on Properties of Wet Sprayed Concrete
Effect of Set Accelerator on Properties of Wet Sprayed Concrete Open
This paper describes sprayed concrete experiments varying the set accelerator dose. Literature on the hydration of cement with modern alkali-free set accelerators is reviewed and two full scale wet spraying experiments have been conducted,…
View article: Rheology modelling of cement paste with manufactured sand and silica fume: Comparing suspension models with artificial neural network predictions
Rheology modelling of cement paste with manufactured sand and silica fume: Comparing suspension models with artificial neural network predictions Open
Manufactured sand is increasingly used in concrete and predicting the rheology of such suspensions based on their composition are necessary. In this study, emphasis is on cement pastes with manufactured sand and silica fume. An artificial …
View article: Application of an Improved Empirical Model for Rheology Prediction of Cement Pastes Modified with Filler from Manufactured Sand
Application of an Improved Empirical Model for Rheology Prediction of Cement Pastes Modified with Filler from Manufactured Sand Open
There is a need for simple but precise prediction models for proportioning concrete with manufactured sand, for use in ready-mix concrete production. For the last two decades, the particle-matrix model has been used in Norway for proportio…
View article: Influence of external environment on early-age expansion characteristics of calcium sulfoaluminate cement-based binders
Influence of external environment on early-age expansion characteristics of calcium sulfoaluminate cement-based binders Open
Calcium sulfoaluminate (CSA) cements are widely being promoted as alternative low CO2 binders. CSA cements can also be expansive and designed to be shrinkage-compensating. The main phase of CSA cement is ye’elimite, which hydrates in the p…
View article: Optimal design of conventional warehousefloors: concrete flooring solutions and racking anchors
Optimal design of conventional warehousefloors: concrete flooring solutions and racking anchors Open
In modern industrial warehouses, the concrete flooring slab is one of the main total cost components.Thus, designers of these structures are under a constant pressure to reduce the total slab cost, while maintaining the expected functional…
View article: Determination of material design values for Steel Fibre Reinforced Self-Stressing Concrete (SFRSSC) structures
Determination of material design values for Steel Fibre Reinforced Self-Stressing Concrete (SFRSSC) structures Open
With steel fibre reinforced concrete (SFRC) technology advancing for multiple decades already there are more and more fields that see the material as an opportunity of making structures more efficient whether cost-wise, time-wise, material…
View article: Investigation of possibility of using steel fibre reinforced self-stressing concrete (SFRSSC) in watertight concrete structures
Investigation of possibility of using steel fibre reinforced self-stressing concrete (SFRSSC) in watertight concrete structures Open
Steel fibre reinforced self-stressing concrete (SFRSSC) has been developing steadily over the last decades with applications of the material now including ground and pile supported slabs as well as raft foundations.Such building elements c…
View article: Determination of screw anchor capacity in ultra-thin steel fiber reinforced self-stressing concrete (SFRSSC) flat slabs
Determination of screw anchor capacity in ultra-thin steel fiber reinforced self-stressing concrete (SFRSSC) flat slabs Open
Industrial concrete warehouse slabs constructed with steel fibre reinforced self-stressing concrete (SFRSSC),with a moderate to high content ( ≥ 30 kg•m -3 ) of steel fibre reinforcement and expansive cementitious additives, can provide eq…
View article: Applicability of micro-fibre reinforced cementitious composites for thin overlays in construction: effect of fibre type and dosage
Applicability of micro-fibre reinforced cementitious composites for thin overlays in construction: effect of fibre type and dosage Open
Nylon and polyvinyl alcohol (PVA) micro-fibres with different geometries were used in 1 vol.% dosage and polypropylene (PP) micro-fibres were used in 1, 1.5 and 2 vol.% dosage to investigate rheological and mechanical properties of cementi…
View article: Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges
Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges Open
The science of rheology is increasingly used to describe the properties of fresh cement paste. Compared to standard workability tests, rheological properties allow for more fundamental investigation, more precise phenomenological descripti…
View article: Method development to evaluate steel fiber performance in concrete with expansive additives under restrained hardening conditions: preliminary results
Method development to evaluate steel fiber performance in concrete with expansive additives under restrained hardening conditions: preliminary results Open
Novel steel molds in form of a rigid cubical shell were developed in order to investigate single steel fiber pull-out resistance in concrete with expansive additive under restrained hardening conditions. The developed steel molds simulate …
View article: The Particle-Matrix model: limitations and further improvements needed
The Particle-Matrix model: limitations and further improvements needed Open
According to the Particle-Matrix Model (PMM) philosophy, the workability of concrete depends on the properties of two phases and the volumetric ratio between them: the fluid matrix phase (≤ 0.125 mm) and the solid particle phase (> 0.125 m…
View article: Three dimensional shape analysis of concrete aggregate fines produced by VSI crushing
Three dimensional shape analysis of concrete aggregate fines produced by VSI crushing Open
We studied the 3-D shape of concrete aggregate fines with particle sizes between 3 µm and 250 µm produced by high-speed vertical shaft impact (VSI) crushing of rock types from 10 different quarries representing a wide range of local Norweg…