Study on the Pozzolanic Effect of Sugarcane Bagasse Ash from Taretan, Michoacán, Mexico, on a Portland Cement Mortar

2015 ◽  
Vol 668 ◽  
pp. 367-374
Author(s):  
J.L. Rodríguez Bucio ◽  
José Luis Reyes-Araiza ◽  
Elia Mercedes Alonso Guzmán ◽  
Alejandro Manzano-Ramirez ◽  
R. Ramírez-Jiménez ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Sugarcane Bagasse ◽  
Cement Mortar ◽  
Agricultural Waste ◽  
Physical And Mechanical Properties ◽  
Pozzolanic Material ◽  
Pull Out ◽  
Sugarcane Bagasse Ash ◽  
The Impact

Since the construction industry is responsible for 30% of the CO2 emissions, one way to reduce the impact of the construction activity is to substitute ordinary Portland cement by pozzolanic materials. The application of using agricultural waste in the production of pozzolanic material is technically feasible, due to the calcination of organic materials and leaving ashes with a fine particle size and high SiO2 content. In the present, it is discussed the pozzolanic effect of sugarcane bagasse ash (SCBA) from Taretan, Michoacán, Mexico, on the physical and mechanical properties of a portland cement mortar. Test specimens were prepared based on replacing sugarcane bagasse ash percentages of 5, 10, 15, 20 and 30 %, relative to the weight of cement. To validate the mechanical properties of the specimens, tensile, flexural and compressive strength was determine. The porosity of the mortar was determined by means of non-destructive ultrasonic testing of pulse rate and electrical resistivity. The contribution of this paper was determine the bond strength of an overlay mortar with SCBA bonded to the concrete substrate by pull-out tests. The results showed that the addition of the sugarcane bagasse ash improved the mechanical strength, adherence of the mortar to concrete, and decreases the porosity on large curing times. Hence, it is suggested the use of Portland pozzolan cement containing sugarcane bagasse ash pozzolan, with the added benefit on the use of agricultural waste.

scholarly journals Effects of nanosilica to improve the mechanical, electrical and durability properties of fiber-reinforced high-volume processed sugarcane bagasse ash cement mortar

2021 ◽  
Author(s):  
Ramasamy Gopalakrishnan ◽  
RAVI KAVERI ◽  
A JohnKirubahar
Keyword(s):  
Sugarcane Bagasse ◽  
Cement Mortar ◽  
Weight Ratio ◽  
Volume Ratio ◽  
High Volume ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
Sugarcane Bagasse Ash ◽  
Pva Fiber ◽  
The Impact

Abstract Nanosilica (NS) has attracted wide variety of usage as cement ingredients. While many other studies have focused on early cement hydration and hardening properties, there is less data available on the impact of NS on the behavior of fiber-reinforced high-volume sugarcane bagasse cement mortar (HVSCBAM). The effects of NS on the fiber-reinforced durability of HVSCBAM, having the properties of sugarcane bagasse ash/binder in an average of 50% by weight, have been presented in detail in this study. Four NS/binder weight ratio dosages of 0%, 0.5%, 1.0% and 1.5% of and another four total PVA fiber/volume ratio dosages of 0%, 0.2%, 0.5% and 1.0% were used. Compared to 0.2-1 vol.% of PVA fiber–reinforced HVSCBAM, the 1.5 wt.% of NS would enhance the compressive strength further. Various reports on mineralogy and microstructure have demonstrated that NS facilitates fiber/matrix bonding. These conclusions provide an insight into the pozzolanic materials of cement that are used in a large volume in the designs and applications of nanoparticles.

scholarly journals The impact of lithium nitrate on the physical and mechanical properties of Portland cement)

2018 ◽  
Vol 163 ◽  
pp. 04002
Author(s):  
Justyna Zapała-Sławeta ◽  
Zdzisława Owsiak
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Portland Cement ◽  
Isothermal Calorimetry ◽  
Setting Time ◽  
Physical And Mechanical Properties ◽  
Strength Development ◽  
Lithium Nitrate ◽  
Early Hydration ◽  
The Impact

The effectiveness of lithium nitrate as a chemical additive which reduces the negative effects of alkali aggregate reaction was subject to research by scientists in many centres around the world. The literature data on the impact of lithium nitrate on the physical and mechanical properties of cements are rare. Without a precise definition of the impact of lithium nitrate on the cement properties, it is extremely hard to determine its real advantages in practical usage. In this paper, studies were undertaken to assess the impact of LiNO3 on the properties of pastes and mortars with Portland cement. The rate of hydration of the cement with lithium additive was examined by isothermal calorimetry, measurements of setting time and phase composition of cement pastes in the initial stages of hydration. The influence of the admixture on the compressive strength development of mortars after 2, 7 and 28 days of hardening was also researched. Results indicate that lithium nitrate accelerates the early hydration of Portland cement, affecting the precipitation of hydration products. The compressive strength of mortars with lithium admixture decrease after 28 days, although 2 an 7-day strength were greater than the control mortars.

Physical and Mechanical Properties of Chemically Treated Jute Fiber Reinforced MAgPP Green Composites

2016 ◽  
Vol 860 ◽  
pp. 134-139 ◽  
Author(s):  
Sweety Shahinur ◽  
Mahbub Hasan ◽  
Qumrul Ahsan
Keyword(s):  
Mechanical Properties ◽  
Fire Retardant ◽  
Physical And Mechanical Properties ◽  
Fiber Composites ◽  
Jute Fiber ◽  
Green Composites ◽  
Fiber Reinforced ◽  
Pull Out ◽  
Chemically Treated ◽  
The Impact

Natural fibers are biodegradable, non toxic, recyclable, energy efficient and eco-friendly, which reduce the issue of waste disposal as seen in the case of synthetic fibers. Jute is the cheapest lignocellulosic long vegetable bast fiber and abundantly available in South Asia, especially in Bangladesh. It offers a number of benefits as reinforcement in synthetic polymers. In the present study, jute fiber was chemically treated in order to make it fire, rot and water retardant. Jute fiber reinforced green composites were manufactured using preheated chopped jute fiber and maleic anhydrate grafted polypropylene in the hot press machine at a temperature of 180°C and a pressure of 40 kN. Both raw and chemically treated jute fibers at three levels of fiber loading (20, 25 and 30 wt%) were utilized during composite manufacturing. Micro-structural analysis and mechanical testing of the manufactured green composites were subsequently carried out. Chemically treated jute fiber composites showed an improvement in mechanical properties as compared to the maleic anhydrate grafted polypropylene. The impact property was not significantly affected by chemical treatment. At room temperature water uptake increased with fiber weight fraction, while water retardant jute fiber composites absorbed more water as compared to the other composites. The rot retardant treated jute fiber composites had the best set of mechanical properties among all manufactured composites. SEM observation of the fracture surface clearly showed that control and rot retardant jute fiber reinforced green composites had more fiber pull out as compared to fire retardant and water retardant jute fiber reinforced green composites. This indicates better adhesion between the matrix and fiber in case of the fire retardant and water retardant green composites. Chemically treated jute fiber reinforced green composites could be popular as a substitute of plastic in house hold sectors as a moderate load bearing component.

scholarly journals Physical and Mechanical Properties of Compressed Earth Brick (CEB) Containing Sugarcane Bagasse Ash

2016 ◽  
Vol 47 ◽  
pp. 01018 ◽  
Author(s):  
Noorwirdawati Ali ◽  
Nurul Aini Zainal ◽  
Mohd Khairy Burhanudin ◽  
Abdul Aziz Abdul Samad ◽  
Noridah Mohamad ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Sugarcane Bagasse ◽  
Physical And Mechanical Properties ◽  
Sugarcane Bagasse Ash

scholarly journals Valorisation of sugarcane bagasse ash (SCBA) with high quartz content as pozzolanic material in Portland cement mixtures

2018 ◽  
Vol 68 (330) ◽  
pp. 153 ◽  
Author(s):  
A. M. Pereira ◽  
J. C.B. Moraes ◽  
M. J.B. Moraes ◽  
J. L. Akasaki ◽  
M. M. Tashima ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Sugarcane Bagasse ◽  
Hydrated Lime ◽  
Quartz Content ◽  
Pozzolanic Reactivity ◽  
Pozzolanic Material ◽  
Sugarcane Bagasse Ash ◽  
High Quartz ◽  
Sugarcane Industry

Portland cement (OPC) production is one of the most contaminating greenhouse gas producing activities. In order to reduce OPC consumption, several alternatives are being assessed, and the use of pozzolanic material is one of them. This paper presents study on the reactivity of sugarcane bagasse ash (SCBA), a residue from sugarcane industry, as a pozzolanic material. In order to evaluate SCBA reactivity, it was mixed in pastes with hydrated lime and OPC, which were microstructurally characterised. These studies showed that SCBA presents some pozzolanic characteristics. Studies on mortars in which OPC was replaced by SCBA in the range 10–30% were also carried out. Replacement in the range 15–20% yielded the best behaviour in terms of compressive strength. Finally, it can be concluded this ash could be valorised despite its relative low pozzolanic reactivity.

scholarly journals Damage Evolution of Granodiorite after Heating and Cooling Treatments

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 779
Author(s):  
Mohamed Gomah ◽  
Guichen Li ◽  
Salah Bader ◽  
Mohamed Elkarmoty ◽  
Mohamed Ismael
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Failure Mode ◽  
Physical And Mechanical Properties ◽  
P Wave ◽  
Physical Parameters ◽  
Slow Cooling ◽  
Heating And Cooling ◽  
Natural Rock ◽  
The Impact

The awareness of the impact of high temperatures on rock properties is essential to the design of deep geotechnical applications. The purpose of this research is to assess the influence of heating and cooling treatments on the physical and mechanical properties of Egyptian granodiorite as a degrading factor. The samples were heated to various temperatures (200, 400, 600, and 800 °C) and then cooled at different rates, either slowly cooled in the oven and air or quickly cooled in water. The porosity, water absorption, P-wave velocity, tensile strength, failure mode, and associated microstructural alterations due to thermal effect have been studied. The study revealed that the granodiorite has a slight drop in tensile strength, up to 400 °C, for slow cooling routes and that most of the physical attributes are comparable to natural rock. Despite this, granodiorite thermal deterioration is substantially higher for quick cooling than for slow cooling. Between 400:600 °C is ‘the transitional stage’, where the physical and mechanical characteristics degraded exponentially for all cooling pathways. Independent of the cooling method, the granodiorite showed a ductile failure mode associated with reduced peak tensile strengths. Additionally, the microstructure altered from predominantly intergranular cracking to more trans-granular cracking at 600 °C. The integrity of the granodiorite structure was compromised at 800 °C, the physical parameters deteriorated, and the rock tensile strength was negligible. In this research, the temperatures of 400, 600, and 800 °C were remarked to be typical of three divergent phases of granodiorite mechanical and physical properties evolution. Furthermore, 400 °C could be considered as the threshold limit for Egyptian granodiorite physical and mechanical properties for typical thermal underground applications.

Basic Physical and Mechanical Properties of Composites Based on Three Different Cements

2016 ◽  
Vol 677 ◽  
pp. 186-190 ◽  
Author(s):  
Monika Čáchová ◽  
Eva Vejmelková ◽  
Kateřina Šestáková ◽  
Pavel Reiterman ◽  
Martin Keppert ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Open Porosity ◽  
Mercury Porosimetry ◽  
Physical And Mechanical Properties ◽  
Mineralogical Composition ◽  
Physical Parameters ◽  
Vacuum Saturation ◽  
Saturation Method ◽  
Properties Of Composites

This article is focused on cement based composites. Two cements differing in mineralogical composition are utilised as main binder in composites mixtures. Results of measured physical parameters of studied materials are presented. For the sake of comparison, a reference material with Portland cement was also prepared. Basic physical properties (measured by water vacuum saturation method and by helium pycnometry), characterizations of pore system (determined by mercury porosimetry) and mechanical properties are the matter of this study. Composites show various open porosity; the results of open porosity of materials containing special cements show higher values, in comparison with composite based on Portland cement. This fact of course influences other material characteristics - mainly mechanical properties.

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