Design of the Ternary Gypsum-Based Building Composite Using Simplex Optimization

Doleželová, Magdaléna; Pokorný, Jaroslav; Vimmrová, Alena

doi:10.1007/978-3-030-02257-0_10

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…The gypsum mortar has primarily pores of size about 1 µm 3. The mortar with the composite binder has these pores partially filled by CSH-phases formed during the pozzolanic reaction [5]. Size of pores in the lime mortar is between 10 −8 m and 10 −4 m. Therefore, all three mortars have mainly capillary pores (10 −9 -10 −3 m).…”

Section: Resultsmentioning

confidence: 99%

“…According to recent research [4], moisture resistance can be improved by adding lime and silica fume to gypsum binder where lime acts as an alkaline activator of the pozzolan reaction. Mortar with such binder is being developed and researched [5], but some of its properties are still unknown, for example mold resistance which is important but often neglected property. Molds belong to microorganisms, that commonly appear on inner and outer surfaces of building structures and can cause sick building syndrome (people in a building feel ill from no apparent reason) and threaten human health [6].…”

Section: Introductionmentioning

confidence: 99%

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Resistance of Mortars With Gypsum, Lime and Composite Binders Against Molds

Krejsová¹,

Doleželová²

2019

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Resistance of three mortars (the lime mortar, the gypsum mortar and the mortar with the composite binder) against molds was evaluated. Mortars were also compared according to their pH, bulk density, strength and porosity. Experiments showed that the lime mortar has the best resistance against molds and the lowest bending and compressive strength. The mortar with the composite binder has better mold resistance and higher bending and compressive strength than the gypsum mortar.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Resistance of Mortars With Gypsum, Lime and Composite Binders Against Molds

Krejsová¹,

Doleželová²

2019

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“…It has been proven that the thermal conductivity of gypsum-based wheat or barley straw bio-composites can increase 2-3 times if the materials are exposed to moisture and drying-wetting processes can happen. The moisture resistance of gypsum bio-based composites can be improved by adding lime and silica fume (1.7-11% of lime and 2-5.3% of silica fume) to gypsum binder where lime acts as an alkaline activator of the pozzolan reaction [82].…”

Section: Moisture and Water Resistancementioning

confidence: 99%

Gypsum, Geopolymers, and Starch—Alternative Binders for Bio-Based Building Materials: A Review and Life-Cycle Assessment

et al. 2020

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To decrease the environmental impact of the construction industry, energy-efficient insulation materials with low embodied production energy are needed. Lime-hemp concrete is traditionally recognized as such a material; however, the drawbacks of this type of material are associated with low strength gain, high initial moisture content, and limited application. Therefore, this review article discusses alternatives to lime-hemp concrete that would achieve similar thermal properties with an equivalent or lower environmental impact. Binders such as gypsum, geopolymers, and starch are proposed as alternatives, due to their performance and low environmental impact, and available research is summarized and discussed in this paper. The summarized results show that low-density thermal insulation bio-composites with a density of 200–400 kg/m3 and thermal conductivity (λ) of 0.06–0.09 W/(m × K) can be obtained with gypsum and geopolymer binders. However, by using a starch binder it is possible to produce ecological building materials with a density of approximately 100 kg/m3 and thermal conductivity (λ) as low as 0.04 W/(m × K). In addition, a preliminary life cycle assessment was carried out to evaluate the environmental impact of reviewed bio-composites. The results indicate that such bio-composites have a low environmental impact, similar to lime-hemp concrete.

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