An overview on the effect of internal curing on shrinkage of high performance cement-based materials

Effects of saturated lightweight sand content on key characteristics of ultra-high-performance concrete

Effects of SAP on the properties and pore structure of high performance cement-based materials

The mechanical strength, degree of hydration, and electrical resistivity of cement pastes modified with superabsorbent polymers

Cement-based materials modified with superabsorbent polymers: A review

The effect of different quantities of admixed superabsorbent polymers (SAP) on durability and strength properties of normal strength mortars containing various binary cement blends was investigated. Addition of SAP did not significantly affect compressive strength, although a slight retardation of strength development was observed in mortars with higher w/b ratio. Tensile strength values were generally slightly improved with the use of SAP. Durability was assessed by measuring porosity, oxygen permeability, chloride conductivity, accelerated carbonation, and bulk diffusion. The generally improved durability properties, especially for mortars containing silica fume, indicates the potential to use SAP to design high quality concrete repair mortars.

The influence of superabsorbent polymers on strength and durability properties of blended cement mortars

The use of superabsorbent polymers (SAP) was found to significantly improve cracking characteristics of normal strength bonded mortar overlays containing silica fume. Mortars were designed with two water/binder ratios and three different SAP contents and tested for relevant material properties such as tensile strength, tensile relaxation, elastic modulus and drying shrinkage. With respect to overlay cracking, SAP addition generally resulted in an improvement in all tested properties, especially with respect to increasing relaxation and reduced elastic modulus. To observe cracking in real bonded overlays, mortars were cast on a rigid substrate and their cracking behavior observed for a period of approximately 7 weeks. The results indicate that SAP additions of 0.4% and 0.6% are very effective in reducing cracking in bonded mortar overlays with water/binder ratios of 0.45 and 0.55, respectively.

M. Gillmer

Papers

The influence of superabsorbent polymers on strength and durability properties of blended cement mortars

The use of superabsorbent polymers to reduce cracking of bonded mortar overlays