Physical and mechanical characterization of pyroclastic materials in Baleng area (Bafoussam, West-Cameroon): implication for use in civil engineering

VOUFFO, Marcel; Tiomo, Idriss Franklin; FANMI, Hervé KEMTCHOU; DJOUMEN, Tatiana KAMGA; Nicolas, François

doi:10.1016/j.cscm.2022.e00916

Cited by 4 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Palma, on 19 September 2021 (Figure 1), between 8 and 9 million cubic meters of ash wer expelled, according to the Instituto Volcanológico of the Canary Islands. Pyroclastic materials from past and recent volcanic eruptions have been widely used especially in the manufacture of aggregates, concrete, mortars, and cement [3][4][5]. Today the volcanic materials of the Canary Islands are considered an invaluable geological her itage [6], including the geomorphological aspects in which they are framed.…”

Section: Introductionmentioning

confidence: 99%

“…This team of researchers [15] have also successfully employed pyro clastic materials in the construction of the non-surface layers of roads. Yanes and Del Rí [16] carried out a study on the mechanical behavior and water vapor transmission prop erties of specimens made with pyroclastic material, to which they added standardize percentages of expanded polystyrene (EPS), resulting in a decrease in the weight of th Pyroclastic materials from past and recent volcanic eruptions have been widely used, especially in the manufacture of aggregates, concrete, mortars, and cement [3][4][5]. Today, the volcanic materials of the Canary Islands are considered an invaluable geological heritage [6], including the geomorphological aspects in which they are framed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

et al. 2023

View full text Add to dashboard Cite

The eruption of the Cumbre Vieja volcano on 19 September 2021, resulted in the deposition of large quantities of volcanic ash (VA), causing a great impact on the citizens. This work aims to study the properties of this volcanic ash as pozzolanic raw materials to establish their potential use in the development of sustainable cement. Results of chemical and technical characterization are presented. To achieve this goal, Ordinary Portland Cement (OPC) was replaced with standardized percentages of OPC/VA: 10, 25, and 40%. Characterization studies were carried out using chemical analysis of X-ray fluorescence (XRF), chemical quality analysis (QCA), pozzolanicity test (PT) at 8 and 15 days, as well as determining the mechanical strength (MS) at 7, 28, and 90 days. The results obtained by XRF and QCA established that the chemical composition of the VA corresponds to that of the natural pozzolan typical of pyroclastic genesis. The PT test showed that the analyzed samples have a marked pozzolanic nature, both at 8 and 15 days, showing a significant increase in their hydraulic reactivity. Likewise, the MS tests confirmed a continuous increase in mechanical compressive strength, which increased significantly from 7 to 90 days of curing, reaching more than 58 MPa. On the other hand, mechanical tests showed that the three types of dosages used OPC/VA: 10, 25, and 40% were equally effective, with OPC/VA formulations: 10–25% being the most effective. The results obtained in this research could be used by local industries as a guide for the correct use of the volcanic materials of this island, both for the manufacture of construction materials, such as aggregates, and to produce pozzolanic cement with low CO2 emissions, thus having a positive impact on the environment. Finally, the great natural availability of natural VAs in the surrounding areas of La Palma could cover part of the needs for materials used in the construction and restoration of houses and infrastructures damaged during the volcanic eruption.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The fineness modulus and particle size distribution of the sands classified as very fine were modified to fulfill ASTM C33 [31] requirements. In this paper, the particle sizes of the sands were corrected using the Abrams rule [10,32], which involved blending coarse sand with a high fineness modulus (𝐹𝑀 𝐶𝑆 ) and a fine sand with a fineness modulus (𝐹𝑀 𝐹𝑆 ), to achieve a targeted fineness modulus (𝐹𝑀 𝑂𝑃𝑇 ) of 2.5, which is within the acceptable range of the ASTM and NM EN12620 criteria. The proportions of the two sands were determined as: Proportion of coarse sand in the mixture:…”

Section: Correction Of Superfine Sandmentioning

confidence: 99%

“…The fresh and hardened properties of concrete rely on the characteristics and volume fractions of these primary components, along with the Thus, the quality of both the sand and coarse aggregate is essential in assessing the performance of structural concrete. Nevertheless, many local contractors in various parts of Africa often use readily available sand and coarse aggregate without considering their potential impact on the performance of the concrete [4,7,[9][10][11]. Moreover, many of these contractors often lack the resources or capacity to conduct quality control on these materials before their use on site.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Impact of Material Selections, Mixing Techniques, and On-site Practices on Performance of Concrete Mixtures

Hattani,

Menu,

Allaoui

et al. 2024

Civ Eng J

View full text Add to dashboard Cite

This paper aims to evaluate the influence of sand quality, water-to-cement ratio, binder properties, mix design methods, and mixing techniques on the fresh and hardened properties of concrete. The physicochemical characteristics of coarse aggregates, sands, and binders were analyzed. The experimental results show that the binders and coarse aggregates met standard specifications. However, none of the sands meet construction standards. Corrections were necessary for the dune sands to meet construction standards in terms of grain size distribution and fineness modulus. The results also show that the concretes formulated using the Dreux-Gorisse method exhibited higher quality than the locally formulated concretes. Furthermore, it was found that hand mixing resulted in inadequate mixing, material wastage, lower strength, and increased porosity, whereas machine mixing produced concretes with a more homogeneous microstructure, uniform particle distribution, lower porosity, and higher strength. The batch variability and compressive strength of the hand-mixed concretes were also found to be influenced by the expertise level of the batch mixer and the number of successive hand batches. It was also found that both the soluble silica and the inert methods are reliable for determining binder content in machine-mixed concrete. However, the soluble silica method occasionally exhibited significant variations in hand-mixed concrete compared to the inert method. A combined approach utilizing the average of both methods enhances the overall reliability of the binder content values. Observations on construction sites revealed widespread deviations from recommended guidelines. Issues such as lack of material inspection, proper stockpiling, ingredient contamination, and inadequate batch mixing contributed to variations in concrete workability, porosity, and compressive strength. Doi: 10.28991/CEJ-2024-010-02-016 Full Text: PDF

show abstract

“…At the same time, the mechanical properties of a soil give an account of the degree of alteration that led to its formation [3]. The comparative analysis of these parameters can inform on the quality of the mother rock and the process of alteration from geological units of different mineral compositions and ages, to decide globally on the mode of formation of a soil and the geological structure from which it comes [4,5].…”

Section: Introductionmentioning

confidence: 99%

Laterization Process Recognition along the Northern Border of the Congo Craton by Geoelectrical and Geotechnical Data

Nkoungou¹,

Tsala

Oyoa

et al. 2023

International Journal of Geophysics

View full text Add to dashboard Cite

With the properties of laterites being related to the nature of the rock from which they are derived, twenty vertical electrical surveys and twenty boreholes for geotechnical tests, distributed in two units (plutonic and green belt zones) of the Ntem complex located at the northern limit of the Congo Craton, were implemented to study the formation process of the laterites of this geological structure. The inversion of the geoelectrical data in the plutonic area resulted in three lateritic layers with resistivities of 1090 Ω·m, 1302 Ω·m, and 1122 Ω·m, with induration and leaching indices of 28.9% and 72.56%. In the green belt zone, three lateritic layers were also identified with resistivities of 1080 Ω·m, 943 Ω·m, and 1158 Ω·m, with induration and leaching indices of 28.8% and 72.55%. The similarities of the geomechanical parameters (induration and lixiviation indices) show that these soils experienced similar weathering patterns during the same geological period, confirmed by CBR values, corresponding to PF3 platforms that can be used in road works. However, the average resistivity values in the different geological units (1171.77 Ω·m and 1061.16 Ω·m in plutonic and green belt areas) reflect the observed differences in resistivity values of the bedrock alterations (3413.51 Ω·m and 1569.32 Ω·m in plutonic and green belt areas), showing that these laterites are derived from different bedrock weathering. In addition, the average permeability values obtained in the plutonic zone ( k = 6.24 E − 05 cm/s) and in the green belt zone ( k = 5.82 E − 05 cm/s) confirm this difference. The reduction in the difference between the resistivities of the laterites compared to the difference observed in the bedrock of the two units highlights the leaching process over a long geological period.

show abstract

Physical and mechanical characterization of pyroclastic materials in Baleng area (Bafoussam, West-Cameroon): implication for use in civil engineering

Cited by 4 publications

References 19 publications

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

Volcanic Ash from the Island of La Palma, Spain: An Experimental Study to Establish Their Properties as Pozzolans

Evaluating the Impact of Material Selections, Mixing Techniques, and On-site Practices on Performance of Concrete Mixtures

Laterization Process Recognition along the Northern Border of the Congo Craton by Geoelectrical and Geotechnical Data

Contact Info

Product

Resources

About