An experimental study on durability properties of concrete containing zeolite as a highly reactive natural pozzolan

Najimi, Meysam; Sobhani, Jafar; Ahmadi, Babak; Shekarchi, Mohammad

doi:10.1016/j.conbuildmat.2012.04.038

Cited by 280 publications

(164 citation statements)

References 39 publications

Supporting

Mentioning

147

Contrasting

Unclassified

Order By: Relevance

“…Meanwhile, several studies have been found to investigate the performance of SCC incorporating byproduct waste material [5][6][7]. However, the research on bottom ash in the SCC is limited.…”

Section: Introductionmentioning

confidence: 99%

Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Jamaluddin

Hamzah

Ibrahim

et al. 2016

MATEC Web of Conferences

View full text Add to dashboard Cite

Abstract. This paper presents the effect of using coal bottom ash as a partial replacement of fine aggregates in self-compacting concrete (SCC) on its fresh properties and flexural strength. A comparison between SCC with various replacements of fine aggregates with coal bottom ash showed that SCC obtained flexural strength decrease on increase of water cement ratio from 0.35 to 0.45. The natural sand was replaced with coal bottom ash up to 30% volumetrically. The fresh properties were investigated by slump flow, T500 spread time, L-box test and sieve segregation resistance in order to evaluate its self-compatibility by compared to control samples embed with natural sand. The results revealed that the flowability and passing ability of SCC mixtures are decreased with higher content of coal bottom ash replacement. The results also showed that the flexural strength is affected by the presence of coal bottom ash in the concrete. In addition, the water cement ratios are influence significantly with higher binder content in concrete.

show abstract

Section: Introductionmentioning

confidence: 99%

Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Jamaluddin

Hamzah

Ibrahim

et al. 2016

MATEC Web of Conferences

View full text Add to dashboard Cite

show abstract

“…In the cement industry, the natural zeolite is a very popular natural pozzolan in some regions of the world. It is used in great amounts as a pozzolanic material in places like China (Najimi et al, 2012), Iran (Ahmadi & Shekarchi, 2010) and Cuba (Rosell et al, 2006), among others. In China, it is widely used as an addition to cement and the total amount of zeolite consumed for this purpose is as much as 30 million tons a year (Poon et al, 1999).…”

Section: State Of the Artmentioning

confidence: 99%

“…Also, due to its ease to adopt diverse forms and sizes (Najimi et al, 2012). Owing to the importance in the use of concrete as a structural material and to its impact in the environment as a consumer of great quantities of natural resources and emitter of CO2 in the concrete industry, it is necessary to develop, from the science of materials, mixtures that support the growth of the construction industry and that consider the environment.…”

Section: Introductionmentioning

confidence: 99%

“…En la actualidad, el hormigón es uno de los materiales de construcción más ampliamente utilizados debido a su bajo precio, apropiadas características mecánicas y de durabilidad, así como por su facilidad de adoptar diversas formas y tamaños (Najimi et al, 2012). Debido a la importancia del uso del hormigón como material estructural de construcción y a su impacto ambiental como consumidor de grandes cantidades de recursos naturales y emisor de CO2 en la industria del cemento, es necesario desarrollar, desde la ciencia de materiales, mezclas que acompañen el crecimiento de la industria de la construcción considerando el medioambiente; es decir desarrollar materiales energéticamente eficientes.…”

Section: Introductionunclassified

See 1 more Smart Citation

Zeolite, Study of Aptitude as a Natural Pozzolan Applied to Structural Concrete

Raggiotti

Positieri

Locati³

et al. 2015

Revista de la Construcción

View full text Add to dashboard Cite

Nowadays, concrete is one of the most widely used construction materials due to its low price, appropriate mechanic characteristics and durability. Also, due to its ease to adopt diverse forms and sizes (Najimi et al., 2012). Owing to the importance in the use of concrete as a structural material and to its impact in the environment as a consumer of great quantities of natural resources and emitter of CO2 in the concrete industry, it is necessary to develop, from the science of materials, mixtures that support the growth of the construction industry and that consider the environment. Therefore, it becomes necessary to develop energetically efficient materials. A natural zeolite was studied as a material with potential pozzolanic activity and as partial replacement in different percentages of Portland cement in structural concrete. The results of the mechanic trials in concrete samples prove the feasibility of using this element as pozzolanic material.Keywords: Zeolite, Concrete, Pozzolan, Mineral Admixture, Replacement. ResumenEn la actualidad, el hormigón es uno de los materiales de construcción más ampliamente utilizados debido a su bajo precio, apropiadas características mecánicas y de durabilidad, así como por su facilidad de adoptar diversas formas y tamaños (Najimi et al., 2012). Debido a la importancia del uso del hormigón como material estructural de construcción y a su impacto ambiental como consumidor de grandes cantidades de recursos naturales y emisor de CO2 en la industria del cemento, es necesario desarrollar, desde la ciencia de materiales, mezclas que acompañen el crecimiento de la industria de la construcción considerando el medioambiente; es decir desarrollar materiales energéticamente eficientes. Se estudió una zeolita natural como un material con potencial actividad puzolánica y como reemplazo parcial en distintos porcentajes del cemento pórtland en hormigones estructurales. Los resultados de ensayos mecánicos en hormigones evidencian la factibilidad de utilizar esta adición como material puzolánico.

show abstract

“…Natural zeolite is a hydrated aluminosilicate with Si-O and Al-O tetrahedral bonded as a building unit. It has been widely reported as an effective pozzolan for concrete in strength and durability aspects due to its exchangeable cation content and the crystallinity in addition to pozzolanic reaction and filling effects [6][7][8]. The exchangeable alkali cation that contain in most zeolite or cation exchange capability (CEC) effectively altered the chemistry of cement pore solution.…”

Section: Introductionmentioning

confidence: 99%

Effect of Synthetic and Natural Zeolite on ASR Expansion

Sujjavanich¹,

Wongtanasarasin²,

Kongkachuichay³

2017

View full text Add to dashboard Cite

Abstract. The cation exchange capability (CEC), pozzolanic reaction, and filling effects are important keys of natural zeolite for mitigation of Alkali Silica Reaction (ASR), but variation of the zeolite's composition is a major problem when it is utilized. This may not be the case for synthetic zeolite. This paper presents the effects of natural and synthetic zeolite on Alkali Silica Reaction's expansion control. The percentage cement replacement of synthetic zeolite A (SZ) were 0.5, 1.0, 1.5, 2.5, 5,7.5, and 10 and ground natural zeolite, clinoptilolite (NZ), were 10 and 20. It was found that the large percentage replacement (10-20%) changed behaviors of fresh and hardened mixtures significantly. Large replacements of SZ (i.e., 7.5 and 10%) significantly reduced workability and compressive strength, and increased expansion. Slight reductions in expansion were found for the use of small percentage replacement (SZ<5.0%). Chemical analysis and strength reactivity index tests revealed the non-pozzolanic properties of synthetic zeolite, but not the ground natural one, NZ. The NZ exhibited both pozzolanic reactivity and the capability to significantly reduce expansion. At 20% replacement of NZ, the expansion significantly reduced to none at 14 days of acceleration and less than 0.02% at the longer duration of 28 days. It was confirmed that the high CEC of the studied synthetic zeolite is not the key factor for the effective mitigation for ASR.

show abstract

An experimental study on durability properties of concrete containing zeolite as a highly reactive natural pozzolan

Cited by 280 publications

References 39 publications

Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Fresh Properties and Flexural Strength of Self-Compacting Concrete Integrating Coal Bottom Ash

Zeolite, Study of Aptitude as a Natural Pozzolan Applied to Structural Concrete

Effect of Synthetic and Natural Zeolite on ASR Expansion

Contact Info

Product

Resources

About