Abstract
The Arabian Gulf environment has an adverse impact on concrete structures because of the high ambient temperature, humidity, salt contaminated dust, sea water and underground salts. As an innovative solution, reinforced modified sulfur concrete (MSC) pipes are recognized as a durable and economical solution for deterioration of pipelines. This work describes the manufacture and characterization of new MSC based on a cost effective sulfur modification process. Bitumen, a by-product from crude oil refining process was used to modify elemental sulfur and enhance its physical, mechanical properties, and mostly to increase its corrosive resistivity. The study has focused on optimizing the proportions of an offered MSC mixes that are composed of modified sulfur (MS) as a binder, crushed sand, dune sand and ladle furnace (LF) slag as aggregates, and ground granulated blast furnace slag (GGFBS) as a filler. To maximize the physical and mechanical properties of MSC sewer pipes, different mixtures were prepared and investigated. The optimum mix of MSC has a maximum compressive strength of 64 MPa, maximum splitting tensile strength of 4.5 MPa, maximum flexural strength of 21 MP, with a high corrosion resistance in acidic and salty environments.
Highlights
These Improving concrete durability in sewerage systems against attack by strong mineral acids and salts can be accomplished by using modified sulfur concrete (MSC)
Bitumen, a by-product from crude oil refining process was used to modify elemental sulfur with the aid of a non-ionic surfactant agent to facilitate the compatibility between the sulfur and the bitumen
Addition of bitumen in amounts of 2.5– 5% wt. to elemental sulfur initiates chemical reactions are dependent on the bitumen content, heating temperature and reaction time
Summary
These Improving concrete durability in sewerage systems against attack by strong mineral acids and salts can be accomplished by using modified sulfur concrete (MSC). The MSC is a thermoplastic composite concrete consisting of chemically modified sulfur polymer and aggregates [1]. The MSC produced from waste materials is corrosion resistant to harsh environments and impervious to moisture infiltration [2]. MSC has many industrial applications such as sidewalks and road blocks, construction of drainage and sewage facilities, basic coverage foundation, making the acid tanks, manufacturing and repairing concrete platforms, etc. Research and development of MSC are in advance to discover possible usage of elemental sulfur present in many nations as a by-product of the oil and gas industry. The MSC produced from waste materials is corrosion-resistant and impervious to moisture infiltration
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