Thermal history on the samples. The effect of cement water (CW) on swell pressure of all thermal history induced bentonite specimens (B 1 and B 2), compacted at various densities (1.5 Mg/m 3, 1.75 ...
soil improvement: Bani Baker et al. 7, uLi 8, Cheng et al. 9 and Taha and Taha 10 developed the role of nano-bentonite ... It is used as an adjuvant in the manufacture of concrete, as a
Considex the addition of clay to concrete. A typical bentonite has a surface area of 20.000 sq cm, gm. compared to cement MATERIALS IN ENGINEERING APPLICATIONS, Vol. 1, December 1979 339 which has 3,000 sq. cm./gm. Only some 3% bentonite is enough to treble the total particle surface area, resulting in a reduc- tion in …
Moreover, the added bentonite could transform large capillary pores into small capillary pores more obviously compared to the same particle dimension quartz. Besides, it is worth noting that the large capillary pores could be fined to be medium capillary pores under the role of bentonite, which was highly consistent with the results …
Oxic corrosion was observed predominantly at the bentonite/steel liner interfaces, pointing towards a role of air entrapped between the liner and heater during emplacement. At the liner surface, intimate intergrowth of bentonite …
The concrete–bentonite interactions, and more general, concrete–clay interactions, have been studied as part of the expected geochemical reactions occurring within the composite engineered barriers in high-level radioactive waste in deep geological repositories (e.g. US DOE, 2014).The long-term result of such interactions has to be evaluated in order to …
Yes, bentonite can be used in concrete construction as a mineral additive to improve the workability and durability of concrete. It can also be used as a grouting …
The mechanical properties variation of concrete produced with sepiolite is comparable to concrete made with bentonite, which can be recommended under the condition of available sepiolite material and seepage water with high contamination. ... Important roles exist for clay minerals in clean energy production, including light …
In fact, at the present time, the scientific literature has recognised the role of the bentonite only in component A stabilisation and in the SCS at short curing times. In this paper, the geophysical UPV technique made it possible to highlight the role of the bentonite also in the elastic parameters of the hardening grout.
One of the strategic materials used in earth-fill embankment dams and in modifying and preventing groundwater flow is plastic concrete (PlC). PlC is comprised of aggregates, water, cement, and bentonite. Natural zeolite (NZ) is a relatively abundant mineral resource and in this research, the microstructure, unconfined strength, triaxial …
Cement-based grouts have been used successfully to repair cracks in many concrete structures, to ensure the stability of slopes or retaining walls and to reinforce …
The role of bentonites in the process of refining and the catalytic cracking of petroleum is well known [12,13,14]. However, one of the most widespread uses is in the drilling of wells during prospecting and the exploration of metallic, non-metallic and gas–petroleum deposits; In these operations, bentonites play a very important role in the ...
The concrete mortar containing 20% bentonite shows more compressive strength than control concrete mortar . 30% bentonite-concrete blends show higher protection from MgSO 4 and Na 2 SO 4 . Reddy et al. [ 25 ] revealed that 20% bentonite-concrete blend showed ideal compressive strength following 3, 7, and 28 days relieving …
concrete. Here, coarse aggregate of size 20 mm and angular crushed shape is chosen. 3. Bentonite The bentonite used was a sodium type, manufactured by Changsha May Shine Chemical Co., Ltd [Province: Hunan, China] but purchased from Lagos. 4. Water Water plays a major role in concrete mixing in that it starts
Also mixing bentonite in concrete, improve concrete bleeding and cohesiveness of concrete in low-intensity level . Table 3. Effect of bentonite on some of the mechanical properties and durability recorded by different researchers. ... However using of OPC may lack all those important roles of SCMs, ...
Incorporating bentonite in concrete produced better results than the mix with kaolin. When used on its own to replace cement, kaolin compromises both compressive …
Lower strengths were observed in Indian calcium bentonite concrete mixes, at the ages 3days, 7 days as well as 28 days of curing. ... The Role of Superplasticizers in The Development of ...
The use of natural bentonite and organo-bentonite as partial replacement of cement in concrete has been studied (Lima-Guerra et al., Citation 2014), the introduction of bentonite as partial cement substitutions in concrete shown that the consistence, workability, density of concrete and water adsorption/absorption decreased.
bentonite, clay formed by the alteration of minute glass particles derived from volcanic ash. It was named for Fort Benton, Mont., near which it was discovered.. The formation of bentonite involves the alteration of volcanic glass to clay minerals; this requires hydration (taking up or combination with water) and a loss of alkalies, bases, …
DOI: 10.1016/j.tust.2023.105412 Corpus ID: 264068758; The role of bentonite in two-component grout: A comparative study @article{Todaro2023TheRO, title={The role of bentonite in two-component grout: A comparative study}, author={Carmine Todaro and Davide Zanti and Andrea Carigi and Daniele Peila}, journal={Tunnelling and …
Bentonite is a natural pozzolanic material mostly composed of SiO 2 and employed in cementing materials for the reduction of cement consumption and CO 2 emission besides improving performance of cement composite material by consuming portlandite to form extra C-S-H gel. So, many researchers studied on partial …
This experimental study focuses on the effects of durability of concrete using fly ash and bentonite as partial replacement of ordinary Portland cement (OPC) in mass concrete.
The main technologies will be described and their role in the formulation of modern advanced concrete will be highlighted. Finally, an outlook on potential developments in the future (e.g. improved curing agents, admixtures which enhance the ductility of concrete) will be provided.
The bentonite used was a sodium type, manufactured by Changsha May Shine Chemical Co., Ltd [Province: Hunan, China] but purchased from Lagos. Water. Water plays a major role in concrete mixing in that it starts the reaction between the ordinary Portland cement, rice husk ash and the aggregates. It also helps in the hydration of the …
SikaProof® Bentonite is a needle‐punched thermally locked Geosynthetic Clay Liner (GCL) used to waterproof below ground concrete structures. It is a waterproofing system which efficiently protects reinforced concrete structures, preventing the penetration of water and subsequent attack by aggressive chemical substances present in the surrounding soil.
Bentonite plays a significant role, particularly in geotechnical engineering, where it's used as a sealing agent in the construction of dams, landfills, and borehole drilling. One of the key factors driving the growing demand for bentonite in construction …
Keywords: geopolymer concrete, bentonite, recycled aggregates, GRAC, GNAC, mechanical properties, durability, rheological properties. 1. Introduction. ... Air content is a property of fresh concrete that can play an important role in increasing or decreasing the concrete strength. The presence of air content in the concrete also …
Durability displays crucial role in when concrete is . exposed to extrem e conditions ... Lower strengths were observed in Indian calcium bentonite concrete mixes, at the ages 3days, 7 days as ...
A laboratory testing campaign was planned, with the purpose of highlighting the role of bentonite and the importance of the activation phase. According to previous research (Todaro et al., 2022, Todaro and Pace, 2022), the effects of the bentonite have been evaluated in three different stages.The first stage is related to component A when …
Conclusion. Bentonite, with its unique properties and versatile applications, is a valuable material in the construction industry. From soil stabilization and foundation works to drilling fluids and waterproofing, bentonite plays a crucial role in enhancing the stability, durability, and performance of construction projects.
bentonite. The concrete cylinders were used to the hydrochloride acid attack test after 28 days of curing. All the concrete specimens were kept in a curing cabinet and cured at a laboratory ambient temperature of 21 ± 1 ° C and 95% relative humidity until testing. The mixes were abbreviated in one way, LXBX. ...
This research investigates the behaviour and residual properties of bentonite, when used as a partial replacement for cement, in concrete mixtures exposed to elevated temperatures (200 °C, 400 °C, …
Bentonite is valued in foundry sand binding, drilling mud, iron ore pelletisation and as a waterproofing and sealing agent in civil …
Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite - Volume 51 Issue 2. 22 August 2024: Due to technical disruption, we are experiencing some delays to publication. We are working to restore services and apologise for the inconvenience. ... (2006) The role of Al in C-S-H: NMR, XRD, and …
The hydromechanical behavior of compacted bentonite in near-field salinity groundwater environment is of great importance for achieving the low-permeability sealing capacity in deep geological repositories. Within this context, swelling pressure and hydraulic conductivity of compacted bentonites with technological voids were evaluated under …
ANDRA, 2005), have addressed the effect of the alkaline plume induced by concrete on bentonite. The group working on applied clay geochemistry at the Autonomous University of Madrid (UAM) has ...
Expansive minerals (MgO, bentonite, and quicklime) improved the self-healing of PC. ... Unhydrated expansive minerals in the PC blend play vital role in the healing process. ... Portland cement (PC) concrete is an efficient, quasi-brittle, and heterogeneous material, which can withstand high compressive strength. Yet, concrete …
Bentonite is currently widely used to improve the performance of cement mortars. Bentonite is a type of hydrated clay mineral consisting primarily of …