An exercise on making a porch habitable around a patio garden. The plot is surrounded by party walls, and the façade is just one more wall that encloses an interior space that wants to be exterior.
Design: Arquitectura-G
Location: Barcelona, Spain
Area: 203 m²
Year: 2021
Photography: Maxime Delvaux
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In this article, we will delve into the essential properties of hardened concrete, shedding light on its strength, durability, and various o
When it comes to construction materials, concrete stands as one of the most versatile and widely used substances. Its ability to harden into a strong and durable material makes it a cornerstone of modern infrastructure.
Introduction
Hardened concrete is the result of a chemical transformation that occurs within a mixture of cement, water, and aggregates. As this mixture cures, it develops an array of properties that determine its performance and longevity. Let's explore some of the most crucial properties of hardened concrete.
Understanding Concrete Strength
Compressive Strength: Compressive strength is a fundamental property of concrete, representing its ability to withstand axial loads without collapsing. It is measured by subjecting a cylindrical sample to a gradually applied load until failure. The compressive strength of concrete significantly influences its structural integrity.
Tensile Strength: While concrete boasts excellent compressive strength, its tensile strength is relatively low. This deficiency makes it susceptible to cracking under tensile stress. Reinforcement materials like steel bars (rebars) are often incorporated to enhance tensile strength.
Flexural Strength: Flexural strength measures a concrete beam's ability to withstand bending loads. It is crucial in structural elements like beams and slabs. Proper mix design and curing practices contribute to improved flexural strength.
In this article, we will delve into the details of M25 grade and M30 grade concrete, exploring their compositions, strengths, and typical us
Concrete is a versatile and essential construction material known for its strength and durability. Different concrete grades are used to achieve specific characteristics for various applications. Among these grades, M25 and M30 are commonly used designations, each representing a specific mix of concrete with distinct properties.
Introduction
Concrete serves as the backbone of modern construction, offering a combination of strength and versatility. Different grades of concrete are used to meet the specific requirements of diverse projects. M25 and M30 are two such grades that are widely used and play a significant role in construction projects.
Understanding Concrete Grades
Concrete grades are a standardized system used to define the strength and composition of concrete mixes. The designation consists of the letter "M" followed by a number, such as M25 or M30. The number represents the characteristic compressive strength of the concrete in megapascals (MPa) after a curing period of 28 days.
M25 Grade Concrete
Composition
M25 grade concrete is a mix of cement, sand, and aggregates in the ratio of 1:1:2. The mix contains a moderate amount of cement and is designed to achieve a compressive strength of approximately 25 MPa after 28 days of curing.
Compressive Strength
The compressive strength of M25 grade concrete makes it suitable for various applications, especially those that do not require extremely high strength. It strikes a balance between cost-effectiveness and performance.
STRENGTH OF CONCRETE COLUMN CONFINED BY PLASTIC PIPE (FYC).
STRENGTH OF CONCRETE COLUMN CONFINED BY PLASTIC PIPE (FYC).
STRENGTH OF CONCRETE COLUMN CONFINED BY PLASTIC PIPE (FYC).
Abstract:
This experimental investigation was carried out to determine the strength of concrete confined by plastic pipe and the effect of slenderness ratio on the strength. Pipes of 75mm and 100mm diameters of varied lengths: 410mm to 1210mm were used. Two different concrete mixes were tested: a 1.5 sand-cement ratio and 3 coase…
A New Method for Reinforcing Concrete Rectangular Section Columns
Authored by Xiantao Zeng*
This paper presents a new method for the reinforcement of a rectangular section concrete column by bidirectional prestressed angle steel plates. The rectangular section column is divided into an upper reinforcement section, an axial prestressed elevation section and a lower reinforcement section. Four angle steel plates are installed in the upper and lower reinforcement sections, and the concrete columns are reinforced with circumferential prestressing. In the axial prestressing jacking section, axial prestressing angle steel plates mounted on the upper and lower reinforcing sections are axially prestressed by axial prestressing jacking bolts. A preliminary experimental analysis shows that the load capacity of the concrete column after reinforcement is 2-5 times that of the original concrete column. The implementation of the new method does not affect the use of the concrete column and does not damage its structure, and the pre-stress can be adjusted to ensure that the original structure and the reinforcement structure layer are stressed synchronously. The failure mode of the concrete in the column changes from brittle failure to plastic failure, and the stiffness, ductility and seismic resistance of the column are obviously improved after the reinforcement.
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