Effects of biogenic sulfuric acid on simulated concrete septic tanks/ (Record no. 88612)

MARC details
000 -LEADER
fixed length control field 04385nam a22001937a 4500
003 - CONTROL NUMBER IDENTIFIER
control field KE-MeUCS
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250325105034.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 250320b xxu||||| |||| 00| 0 eng d
020 ## - INTERNATIONAL STANDARD BOOK NUMBER
International Standard Book Number
022 ## - INTERNATIONAL STANDARD SERIAL NUMBER
Source
040 ## - CATALOGING SOURCE
Transcribing agency KE-MeUCS
Modifying agency KE-MeUCS
050 ## - LIBRARY OF CONGRESS CALL NUMBER
Classification number TD 778.G3 2024
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Gachie, Irungu Simon
245 ## - TITLE STATEMENT
Title Effects of biogenic sulfuric acid on simulated concrete septic tanks/
Statement of responsibility, etc Simon Irungu Gachie
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication, distribution, etc Meru:
Name of publisher, distributor, etc Simon Irungu Gachie,
Date of publication, distribution, etc 2024.
300 ## - PHYSICAL DESCRIPTION
Extent x,95p
520 ## - SUMMARY, ETC.
Summary, etc Africa and many Asian cities still employ the use of septic tanks to treat wastewater from the<br/>toilet. The use of septic tanks as an on-site wastewater treatment system is economically viable<br/>and affordable to the vast majority of developing nations. However, their utilization has been<br/>met with a dire challenge due to continuous corrosion and degradation of septic concrete<br/>surfaces. Concrete septic septic tanks are Constructed using conventional ordinary portland<br/>cement (OPC) and Portland pozzolana cement (PPC). However, OPC and PPC-based concrete<br/>Septic tanks are susceptible to biological, mechanical, and chemical degradation. Degradation<br/>of the concrete septic leads to their failure hence imposing tremendous environmental<br/>problems. The aftermath is the emergence of sanitation-related diseases. The wastewater from<br/>failing septic systems leads to contamination of the groundwater or the surface water resulting<br/>in the pollution of drinking water. Therefore, the need to explore other possibilities and<br/>potential construction materials to achieve sustainable sanitation is inevitable. The use of<br/>Limestone Calcined Clay Cement (LC3) in the construction of degradation-resistant concrete<br/>septic septic systems has not been well explored in Kenya. LC3 concrete is resistant to the<br/>deterioration effects of aggressive media such as acids, chlorides, and sulfates. Therefore, this<br/>research involved the performance of Limestone Calcined Clay Cement (LC3) as an<br/>alternative cement in the construction of concrete septic structures. The effects of biogenic<br/>sulfuric acid on simulated concrete septic systems made from (OPC) and (LC3) were<br/>investigated. Concrete cubes of OPC and LC3 measuring 150×150×150mm3 were cast and<br/>water cured for 28 days in two sets. One set of cubes was subjected to a biogenic biogenic<br/>sulfuric acid solution of pH2 for 30 days in repeated wet and dry (W-D) cycles. The second<br/>set acting as a positive control, was placed in pure water for 30 days. After 30 days of soaking<br/>in biogenic sulfuric acid solution and pure water, the cubes were subjected to different tests,<br/>which were compressive strength, sorptivity, and porosity. It was observed that after 28 days<br/>of curing, OPC cubes had slightly lower compressive strength of 34.4488 MM2/KN than LC3<br/>whose recorded strength was 32.351 MM2/KN . However, LC3 concrete cubes are expected<br/>to have higher compressive strength than the OPC. Cubes curing time increases due to<br/>increased pozzolanic activity. Sulphuric acid attacks on hydrated cement products cause a<br/>decrease in compressive strength. The water absorption profile of LC3 cubes was lower<br/>(7.1808 kg ) as compared to OPC cubes (8.23446 kg). LC3 cubes had a high potential of<br/>resisting H2SO4 degradation as compared to OPC cubes. After 28 days of curing, OPC cubes<br/>had slightly higher compressive strength than LC3 mortars. However, As a result of increased<br/>pozzolanic activity of the clay pozzolana, the compressive strength of LC3 mortars is expected<br/>to improve significantly than OPC when curing in sulphuric acid. Water absorption was lower<br/>in LC3 than in OPC. Blended cement is less porous than OPC, according to this research. As<br/>a result, they are less susceptible to degradation as a result of strong media penetration .The<br/>resistance to biogenic sulfuric acid attack was stronger in LC3 than in OPC. This revealed<br/>that they might be used to make more durable constructions.Biogenic sulfuric acid attack on<br/>cement hydration products causes a decrease in compressive strength which was witness in<br/>OPC cement. From this work, it can be concluded that LC3 has a good performance profile in<br/>resisting deleterious materials. Therefore, further research is recommended to acertain its use<br/>in the construction of resilient and durable sanitary facilities such as septic tanks.<br/>
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme Library of Congress Classification
Koha item type Thesis
Cataloguer Mercy Musungu
Holdings
Withdrawn status Lost status Source of classification or shelving scheme Damaged status Not for loan Home library Current library Shelving location Date acquired Source of acquisition Cost, normal purchase price Cataloger Total Checkouts Full call number Barcode Date last seen Price effective from Koha item type
    Library of Congress Classification     Meru University Meru University Periodical Section 20/03/2025 Meru University of science and Technology (MUST) 0.00 Mercy Musungu   TD 778.G3 2024 24-37838 20/03/2025 20/03/2025 Thesis

Meru University of Science and Technology | P.O. Box 972-60200 Meru. | Tel 020 2092048 Fax 0208027449 | Email: library@must.ac.ke