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Nigeria's free digital learning hub. Videos, lecture notes, practice questions and leaderboards aligned with CCMAS, NBTE, NCCE, WAEC, NECO, IJMB and JAMB curricula.
Civil Engineering · 300 Level
This is the complete lecture note for CEE 303 Engineering Geology, prepared for Civil Engineering students at 300 Level. You can read it online below, open it in the full viewer, or download the PDF for offline study. It pairs with the course's video lectures, so you can read and watch together.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS COURSE CODE:CEE 303 COURSE TITLE: Engineering Geology SERIES UNIT LOAD (2 Units E: LH 15; PH 45) Series 1: Fundamentals of Rocks, Minerals, and Engineering Properties Series 2: Geological Structures, Mapping, and Stratigraphy Series 3: Fossils, Geological Time Scale, and Applications in Nigeria Series 4: Introduction to the Geology of Nigeria Series 5: Engineering Geology Applications in Water Supply and Construction Projects Proposed Outline for Series 1: • Part 1.1: Rocks and Minerals o 1.1.1 Definition and classification of rocks o 1.1.2 Types of rocks: igneous, sedimentary, metamorphic o 1.1.3 Mineral composition and identification techniques • Part 1.2: Engineering Properties of Rock and Soil Materials o 1.2.1 Strength and durability of rocks o 1.2.2 Permeability and porosity o 1.2.3 Soil consistency and compaction characteristics • Part 1.3: Relevance of Rocks and Minerals in Engineering Geology o 1.3.1 Importance in construction materials o 1.3.2 Role in site investigations o 1.3.3 Case examples from Nigerian geology Introduction Every engineering project, whether it involves constructing a dam, designing a foundation, or planning a water supply system, relies on a sound understanding of the materials beneath our feet. Rocks and minerals form the very framework of the earth, and their properties determine how structures perform and endure over time. By studying these materials, engineers gain the knowledge needed to evaluate sites, select appropriate construction materials, and anticipate potential challenges. This Series therefore sets the stage for appreciating the geological basis of engineering practice.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS The aim of this Series is to introduce you to the essential characteristics of rocks and minerals and to equip you with the ability to evaluate their engineering properties for practical applications. We shall commence this Series by exploring rocks and minerals, considering their definitions, classifications, and methods of identification. Next, we will move on to the engineering properties of rock and soil materials, examining aspects such as strength, durability, permeability, and compaction. Finally, we will wrap up by discussing the relevance of rocks and minerals in engineering geology, highlighting their importance in construction materials, site investigations, and case examples from Nigeria. This progression will provide you with a comprehensive foundation for applying geological knowledge in engineering contexts. Series Learning Outcomes Upon completing this Series, you should be able to: • SLO 1.1 define rocks and minerals and classify them into igneous, sedimentary, and metamorphic groups, • SLO 1.2 explain methods used to identify minerals based on their composition and physical properties, • SLO 1.3 analyse the engineering properties of rock and soil materials including strength, durability, permeability, and compaction, • SLO 1.4 evaluate the relevance of rocks and minerals in engineering geology with reference to construction materials and site investigations, and • SLO 1.5 apply case examples from Nigerian geology to illustrate the practical importance of rocks and minerals in engineering practice. This set of outcomes aligns directly with the three Parts of the Series outline: • Part 1.1 (Rocks and Minerals) → SLO 1.1 and SLO 1.2 • Part 1.2 (Engineering Properties) → SLO 1.3 • Part 1.3 (Relevance in Engineering Geology) → SLO 1.4 and SLO 1.5 1.1 Rocks And Minerals 1.1.1 Definition and classification of rocks Rocks are naturally occurring solid aggregates of one or more minerals, or mineraloids, that form the Earth’s crust. A mineral is a naturally occurring inorganic substance with a definite chemical composition and an ordered internal structure. Rocks are classified into three major groups: igneous, sedimentary, and metamorphic, based on their origin and formation processes.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Igneous rocks form from the cooling and solidification of molten magma or lava. Sedimentary rocks result from the accumulation and compaction of sediments, while metamorphic rocks are produced when existing rocks are altered by heat, pressure, or chemical processes. Fill in the blank: Rocks are classified into __________ main groups based on their origin. [ 1.1.2 Types of rocks: igneous, sedimentary, metamorphic Igneous rocks are further divided into intrusive (formed beneath the surface, e.g., granite) and extrusive (formed on the surface, e.g., basalt). Their texture depends on the cooling rate of magma.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Sedimentary rocks are classified into clastic (formed from fragments of other rocks, e.g., sandstone), chemical (precipitated from solutions, e.g., limestone), and organic (formed from biological material, e.g., coal). Metamorphic rocks are grouped into foliated (with layered structures, e.g., schist) and non-foliated (without layering, e.g., marble). Fill in the blank: Sedimentary rocks formed from biological material such as plant remains are called __________ rocks. 1.1.3 Mineral composition and identification techniques
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Minerals are identified based on their physical properties, which include colour, streak, hardness, cleavage, fracture, lustre, and specific gravity. For example, the Mohs hardness scale is commonly used to compare mineral hardness, ranging from talc (softest) to diamond (hardest). Fill in the blank: The hardness of minerals is commonly measured using the __________ scale. Pilot questions 1.1 1. Which three main groups are rocks classified into? 2. What is the difference between intrusive and extrusive igneous rocks? 3. Name one example of a clastic sedimentary rock.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS 4. What property is measured using the Mohs scale? 5. Distinguish between foliated and non-foliated metamorphic rocks. 1.2 Engineering Properties Of Rock And Soil Materials 1.2.1 Strength and durability of rocks Strength refers to the ability of a rock to resist applied forces without failure. It is measured through tests such as compressive strength, tensile strength, and shear strength. Durability is the capacity of a rock to withstand weathering and environmental conditions over time. Strong and durable rocks, such as granite, are often used in construction because they can support heavy loads and resist deterioration. Fill in the blank: The ability of a rock to resist applied forces without failure is called __________.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS 1.2.2 Permeability and porosity Porosity is the percentage of void spaces within a rock or soil, while permeability is the ability of those voids to allow fluids to pass through. High porosity does not always mean high permeability, as the pores must be interconnected for fluids to flow. These properties are critical in engineering geology because they affect groundwater movement, stability of foundations, and suitability of materials for construction. Fill in the blank: The percentage of void spaces within a rock or soil is referred to as __________.
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