Sustainable Handling of Construction and Demolition (C &amp; D) Waste

Bansal, Shishir; Singh, Sangam Kumar

doi:10.18488/journal.13/2015.4.2/13.2.22.48

Cited by 14 publications

(8 citation statements)

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“…The removal efficiency depends on the properties of the adsorbent, pH, contact time, adsorbent dose and initial concentration of nickel. Maximum removal ratio was 51.8% with dilute solution at 20 g/L adsorbent dose [12].…”

Section: Literature Reviewmentioning

confidence: 95%

Heavy Metals Removal from Agricultural Drains using Rice Husk inside the Stream

M. H.,

M.A.F.*

2019

IJITEE

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With the stabilization in water amounts on earth and the population growth and the water use increase in human life with the progress of all facilities and industries, the need to reuse of all available water resources be the most important issue for the research specially the reuse of all wastewater types. For the agricultural wastewater is the huge amount of wastewater and also it is the main disposal for all other wastewater, so its treatment became the most easy way to get new water resource with big quantities and continuity. The most serious problem in the drain wastewater is industrial wastewater pollutants for its containing of heavy metals and toxic substances. The study concentrates on finding a low cost and easy treatment procedure to make the dream of the agricultural drain wastewater reuse possible. Several studies applied agricultural wastes as an adsorbent material for removing successfully heavy metals from wastewater. So, in this study rice husk was used by putting as a block across the steam to work as adsorbing filter to remove the existing zinc and chromium appears due to industrial wastewater direct disposal in agricultural drains wastewater. The obtained Zn+2 removal ratios was 94.33% and Cr (VI) removal ratio was 89.2%. The study illustrated that the removal ratio is proportional with the adsorption media length for the contact time increase. The rice husk waste achieved removal efficiency for zinc better than Cr (VI). The success of use the agricultural waste as cheap adsorbent in treatment of agricultural drains wastewater polluted from industrial wastewater open the door for the existing drains to be easily treated with minimum cost and no effect on their profiles and saving the environment from heavy metals harm pollution.

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Section: Literature Reviewmentioning

confidence: 95%

Heavy Metals Removal from Agricultural Drains using Rice Husk inside the Stream

M. H.,

M.A.F.*

2019

IJITEE

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“…Reusing does not need any processing to utilize the certain material. The items can be directly used after being collected through, without any conversion or energy input (Bansal and Singh, 2014). Reusing construction and demolition waste leads to saving natural…”

Section: Construction and Demolition Waste Disposal/management Systemsmentioning

confidence: 99%

The applicability of regulations for the disposal of construction and demolition waste in Sri Lanka

Tissera¹,

Dahanayake²,

Edirisinghe³

2022

Proceedings of 10th World Construction Symposium 2022

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Effective and efficient waste management plans/systems are vital in reducing and maintaining the generation of construction and demolition waste. It was proved in previous research, proper rules and regulations affect the effectiveness of the waste management strategies used in disposing of construction and demolition waste. Therefore, this research aim is to identify the regulations applicable for the disposal of construction and demolition waste in Sri Lanka to propose improvements in the available rules and regulations. Comprehensive literature and document review were conducted to approach the aim of this research. Questionnaire surveys and expert interviews were carried out to validate the findings of the literature survey and to gather required data in identifying the issues related to current rules and regulations and proposing improvements. The findings revealed that many gaps can be identified with the current regulations used in the disposal of construction and demolition waste. The results of the research identified a lack of intention in government regarding recycling, avoiding improper landfilling, and avoiding illegal dumping of construction and demolition waste as major issues. The study finally concluded the necessity of modified rules and regulations regarding the disposal of construction and demolition waste.

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“…In addition to the construction and transportation, water conservancy, port and other civil engineering fields, the shipbuilding industry, machinery industry, ocean development, geothermal engineering, and other related fields also have good applications. − Concrete in the process of long-term bearing, subject to wind and snow erosion, deicing salt corrosion, especially in the dry and wet cycles of marine concrete, , chloride ion erosion, − and wave impact and other multiple effects, would appear cracks, fall off, and other defects and affect the use of esthetic appearance and durability. However, the solution of large-scale demolition and construction is faced with capital consumption, material cost caused by a large amount of construction waste, and time cost caused by shutdown. , Therefore, the research on the repair problem of this kind of project has become a major topic of universal attention in the international engineering field.…”

Section: Introductionmentioning

confidence: 99%

Adhesion Performance of Ettringite at the Interface with Silane and GO/Silane: Insights into Molecular Dynamics Simulations

Duan

Zheng

et al. 2023

ACS Omega

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The application of silane in sulfoaluminate cement repair materials can improve its waterproof, permeability, freeze–thaw, and other properties, but it would reduce the mechanical properties of sulfoaluminate cement-based materials, making it unable to better meet the engineering requirements and durability indices. The modification of silane with graphene oxide (GO) can effectively address this issue. However, the failure mechanism of the interface between silane and sulfoaluminate cement-based materials and the modification mechanism of GO remain unclear. In this paper, the interface-bonding mechanical models of isobutyltriethoxysilane (IBTS)/ettringite and GO-IBTS/ettringite are established by molecular dynamics method to study the source of interface-bonding properties of IBTS, GO-IBTS, and ettringite, as well as the failure mechanism of interface bonding, to reveal the mechanism of GO-modifying IBTS to improve the interface-bonding properties of IBTS and ettringite. This study finds that the bonding properties of the IBTS, GO-IBTS, and ettringite interface are derived from the amphiphilic nature of IBTS, which can only produce unilateral bonding with ettringite, thus becoming a weak link in interface dissociation. The double-sided nature of GO functional groups enables GO-IBTS to interact well with bilateral ettringite, thus enhancing the interface-bonding properties.

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Sustainable Handling of Construction and Demolition (C & D) Waste

Cited by 14 publications

References 0 publications

Heavy Metals Removal from Agricultural Drains using Rice Husk inside the Stream

Heavy Metals Removal from Agricultural Drains using Rice Husk inside the Stream

The applicability of regulations for the disposal of construction and demolition waste in Sri Lanka

Adhesion Performance of Ettringite at the Interface with Silane and GO/Silane: Insights into Molecular Dynamics Simulations

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