The impact of natural and calcined zeolites on the mechanical and durability characteristics of glass fiber reinforced cement composites

Kaplan, Gökhan; Coskan, Ugur; Benli, Ahmet; Bayraktar, Oğuzhan Yavuz; Kucukbaltacı, Ahmet Burak

doi:10.1016/j.conbuildmat.2021.125336

Cited by 37 publications

(7 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In comparison to the control sample, just using 4A zeolite and natural zeolite significantly decrease heat release rate during the second peak by up to 25%. The maximum heat release rate time for the control sample and sample with AX zeolite was reached after 13 h and 11 h. For the sample with 4A zeolite and natural zeolite, the maximum heat release rate time was reached after 17.8 h and 22.2 h. As was pointed in other studies [22,[34][35][36], the presence of natural zeolite leads to lower hydration rates compared to synthetic zeolite.…”

Section: Calorimetrysupporting

confidence: 66%

The Effect of Natural and Synthesised Zeolites on Cement-Based Materials Hydration and Hardened State Properties

2023

View full text Add to dashboard Cite

The synthesis of zeolites from difficult-to-utilise waste materials facilitates the creation of more financially attractive and efficient synthetic zeolites. These can be incorporated into construction materials, resulting in a reduction in cement usage and the production of superior, clean, and sustainable construction materials. The potential to enhance the hydration rate of fresh cement paste by substituting up to 10% of the cement with two synthetic zeolites—one commercially produced and the other synthesised from waste and natural zeolite—was explored. Due to a higher Al/Na ratio, newly sintered waste-based zeolite possesses six times higher electrical conductivity compared to industrially produced 4A zeolite and more than 20 times higher electrical conductivity compared to natural zeolite. As the sequence of this fact, substituting up to 10% of the cement with AX zeolite cement paste accelerates the maximum heat release rate time and increases the total heat by 8.5% after 48 h of hydration. The structure, compressive strength, and water absorption of the hardened cement paste depends on the Al/Na ratio, pH, and electrical conductivity values of the zeolite used. The findings revealed that AX zeolite, due to presence of mineral gibbsite, which speeds up hydration products, such as CSH development, increases the compressive strength up to 28.6% after 28 days of curing and reduces the water absorption by up to 1.5%. Newly synthesised waste-based AX zeolite is cheap because its production is based on waste materials and is mostly promising due to superior properties of created construction materials compared to the other presented zeolites.

show abstract

Section: Calorimetrysupporting

confidence: 66%

The Effect of Natural and Synthesised Zeolites on Cement-Based Materials Hydration and Hardened State Properties

2023

View full text Add to dashboard Cite

show abstract

“…Some of the materials used as concrete additive cause severe environmental pollution. Thus, the use of these materials as concrete additive also allows for the recycling and elimination of the pollutants causing environmental pollution [49][50][51]. As known, environmental pollution is one of the most important problems of today [52].…”

Section: Discussionmentioning

confidence: 99%

Usability of Organic Wastes in Concrete Production; Palm Leaf Sample

Bayraktar

2022

KUJES

View full text Add to dashboard Cite

Palm leaves are vegetal waste that are not widely used by the society, only piled up and causing odors that mix with the environment. Channeling this waste material into the construction industry helps to overcome waste disposal problems as well as promote sustainability. The most important features expected from the buildings are the creation of the most suitable environmental conditions for the products to be stored or the creatures that will live in them, and they can be used safely for a long time. In the construction of the buildings, materials that are the cheapest possible, safe and capable of creating the optimum environmental conditions should be used. The materials to be selected should have sufficient strength and durability, high heat and sound insulation and lightness. Since single-storey buildings are not subject to excessive load, it is important that the thermal insulation is high and light in material selection. Since the widespread use of concrete as a building material in the world, efforts to make concrete light, cheaper and better insulating have gained importance. Lightweight concrete, which is easy to apply, has been an important building material in recent years. With the use of lightweight concrete as a building material, benefits such as economy in terms of material, earthquake resistance, and the elimination of a second insulation material for heat and sound insulation can be achieved. In this study; Experimental study using Portland cement (CEM I), Palm Leaf, CEN standard sand and water mortar production; sample production, curing, some physical and mechanical experiments were carried out in four stages. The usability of palm leaf, which is a vegetable waste, as aggregate in concrete production by replacing it with CEN standard sand at 0, 5, 10, 20, 30 and 40% as well as 10% with cement has been investigated. The study results show that the addition of both ground palm leaf and palm leaf aggregate significantly altered almost all properties of concrete. These changes are at different levels in terms of physical properties. As a result of the study, it was determined that as the amount of foam increased, the spreading diameter increased, whereas palm leaf addition decreased the spreading diameter. It has been determined that the addition of palm leaf decreases the depth of water treatment depending on time, the porosity of the samples with high level of palm leaf addition increases and the compression and bending strength decreases.

show abstract

“…This may be related to that zeolite raw material is mottled and impure, which contains a large number of stable mineral components as inert components in the system, making the performance of the CZL group inferior to that of the blank group on the whole [30]. However, with the further development of the hydration process in the later stage, the active component produced by calcined zeolite plays a supplementary role as cementing material to promote the further hydration reaction [31].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Hydration Characteristics and Mechanical Properties of Cement-Based Materials Modified by Calcined Zeolite and Montmorillonite

Qin¹,

Zhou²,

Yan³

et al. 2023

Journal of Renewable Materials

View full text Add to dashboard Cite

Montmorillonite and clinoptilolite zeolite were used as representative materials to prepare calcined clay-cement binary cementitious materials in order to study the effect of calcination treatment on the activation of clay minerals and the activity difference between layered and framed clays in this research. The influence of different calcined clay content (2%, 4%, 6%, 8%, 10%) on the fluidity, compressive strength, microstructure, phase change, and hydration heat of cement-based materials were analyzed. The calcined clay improves the fluidity of cement-based materials as compared with the uncalcined group. The addition of calcined montmorillonite (CMT) improves the development of mechanical strength, and the optimal compressive strength reaches 85 MPa at 28 days with 8% CMT. However, the activity of calcined clinoptilolite zeolite (CZL) is weak with few reaction sites, which slightly reduced the mechanical strength as compared to the blank sample. The addition of CMT changes the microscopic morphology of hydration products such as C-S-H and C-A-H, leading to the formation and transformation of ettringite in the early stage. It promotes the gradual polymerization of Si-O bonds into Si-O-Si bonds simultaneously, which accelerates the early hydration process. However, CZL acts mainly as a filling function in the cementitious system. In brief, CMT as an admixture can improve the mechanical properties of cement, but CZL has little effect. This work provides a guideline for the applications of calcined clay in cement, considering the influence of clay type on workability and mechanical strength.

show abstract

The impact of natural and calcined zeolites on the mechanical and durability characteristics of glass fiber reinforced cement composites

Cited by 37 publications

References 41 publications

The Effect of Natural and Synthesised Zeolites on Cement-Based Materials Hydration and Hardened State Properties

The Effect of Natural and Synthesised Zeolites on Cement-Based Materials Hydration and Hardened State Properties

Usability of Organic Wastes in Concrete Production; Palm Leaf Sample

Hydration Characteristics and Mechanical Properties of Cement-Based Materials Modified by Calcined Zeolite and Montmorillonite

Contact Info

Product

Resources

About