Brickworks

Brickworks has shaped building construction for centuries – from historic brick façades to modern masonry walls. The term covers both the industrial production of bricks and the masonry built from bricks. In planning, refurbishment, and deconstruction, building physics, structural design, and practical execution converge. For selective interventions – such as conversions, strip-outs, or controlled demolition – hydraulic tools like hydraulic rock and concrete splitters as well as concrete demolition shears play an important role, especially at interfaces between masonry, reinforced concrete, and built-in components. In sensitive or heritage contexts, low-vibration, non-percussive techniques help protect adjacent fabric and reduce follow-on repairs.

Definition: What is meant by brickworks?

Brickworks in the narrower sense means the production facility where clay-based raw materials are formed, dried, and fired into bricks. In practical construction usage, brickworks also denotes masonry made of fired clay bricks (e.g., solid bricks, vertically perforated bricks, clinker) laid with suitable mortars. Brickworks thus unites material, manufacturing process, and building method. It is characterized by high compressive strength, good heat storage, robust durability, and reliable fire and sound protection. In existing buildings, brickworks frequently occurs together with reinforced concrete elements, steel sections, or timber structures – a combination that requires a careful, step-by-step approach during refurbishment, strip-out, and deconstruction.

• Material: fired clay units with defined geometry and performance.
• Production: forming, drying, and firing under controlled conditions.
• Construction method: bonding units with mortar to form load-bearing and enclosure components.

Composition, properties, and manufacturing of brickworks

Bricks are produced from processed clay, which is optimized with additives depending on the product group. After forming (often extrusion), green bodies are dried and fired in continuous or chamber kilns at high temperatures. The resulting properties – bulk density, water absorption, compressive strength, thermal conductivity – depend on the raw material, hole configuration, and firing regime.

• Typical ranges (indicative): bulk density approx. 800 – 2,200 kg/m³; water absorption approx. 2 – 20%; compressive strength classes from low teens up to > 80 N/mm²; thermal conductivity from about 0.10 – 1.3 W/mK depending on perforation and material.
• Additives and optimization: pore-formers for thermal performance, grog for dimensional stability, and finely ground minerals for firing behavior.
• Dimensional stability: shrinkage and warping are minimized through controlled drying curves and kiln profiles.

Manufacturing in the brickworks (production facility)

• Raw material preparation: homogenizing, crushing, mixing, de-airing.
• Forming: extrusion with a defined hole pattern or pressing of solid bricks.
• Drying and firing: controlled temperature and humidity to avoid stresses and warping.
• Quality assurance: dimensional accuracy, strength, water absorption, resistance to freeze-thaw salts.
• Energy and process control: optimized kiln firing, waste-heat recovery, and continuous monitoring for consistent output.
• Documentation: factory production control with batch traceability and retained samples.

Brick masonry in construction

• Types of units: solid bricks, vertically perforated bricks, facing bricks/clinker; suitably selected mortars (e.g., lime-cement or lightweight mortars).
• Masonry bonds: stretcher, header, or block bonds for load transfer and crack minimization.
• Joints: bed and head joints as load-bearing and building-physics interfaces; joint tightness influences thermal and sound insulation.
• Component connections: detailing to slabs, columns, lintels, and bracing elements; movement joints for greater lengths.
• Moisture management: damp-proof courses, splash-water protection at plinths, and capillary breaks at sensitive transitions.
• Openings and lintels: reinforced or prefabricated lintels with verified bearing lengths and crack control at reveals.

Load-bearing behavior, durability, and typical damage patterns

Brick masonry is primarily load-bearing in compression. Transverse tension or shear actions are limited by bonds, mortar bond, and bearing detailing. Durability is ensured by moisture protection, frost-resistant bricks, and appropriate jointing.

Structural performance is influenced by slenderness, unit strength, mortar class, and joint quality. The modulus of elasticity and shear capacity vary with unit type and mortar, while confinement by slabs, ring beams, or bed-joint reinforcement improves resistance to horizontal loads and redistribution. For mixed construction, compatibility at interfaces (differential stiffness, thermal movement) must be considered in detailing and sequencing.

Typical damage patterns

• Moisture and salt damage: efflorescence, spalling, loss of joints due to recurring wetting.
• Cracks: settlements, thermal stresses, missing movement joints, or later openings without temporary shoring.
• Freeze-thaw salt damage: with unsuitable bricks or insufficient splash-water protection at the plinth area.
• Load redistributions: as a result of alterations or removal of load-bearing wall parts without temporary support.
• Interface problems: corrosion and expansive stresses at embedded steel plates or anchors; debonding where steel or concrete restraints were not released.

Planning interventions: refurbishment, conversion, and deconstruction

Interventions in brickworks require a technical survey of the existing structure and coordinated construction and logistics planning. For wall openings, consider load transfer, temporary supports, vibrations, dust and noise emissions, and restoration of fire and sound protection. Deconstruction is performed selectively to separate materials and enable reuse. In existing buildings with mixed construction, brick masonry, reinforced concrete, and steel members meet – here, a combination of splitting, pressing, and cutting enables a controlled approach, for example within strip-out and cutting or during concrete demolition and special deconstruction.

• Pre-investigation: material sampling, endoscopy or radar scanning for hidden inserts, assessment of joint quality and bond, pollutant and coating checks.
• Method selection: choose low-vibration and spark-free techniques near sensitive equipment or heritage façades; define waste and salvage targets early.
• Coordination: interface planning with building services, fire protection, and logistics for removal routes and interim storage.

Selective deconstruction of brick structures

• Gentle release: controlled splitting of wall or pier areas minimizes vibrations.
• Separating composite interfaces: targeted cutting off of steel anchors, reinforcement, or bearing plates at transitions to reinforced concrete or steel.
• Step-by-step dismantling: sequence from removing non-load-bearing layers to disassembling load-bearing sections with temporary supports.
• Material separation: recovering clean fractions of bricks, and handling mortar residues, steel, and concrete separately.
• Documentation for reuse: sorting by format and color, palletizing, and recording provenance to support later application.

Tools, equipment, and methods for working with brickworks

The choice of method is determined by structural conditions, objective (opening, partial deconstruction, full demolition), surroundings, and occupational safety. Hydraulic tools enable precise, low-vibration workflows when properly sized for the application and operated professionally.

• Stone and concrete splitters: wedge-and-spreader technique generates defined separation cracks in masonry. Suitable for openings, recesses, or releasing wall sections, especially where vibrations or sparks must be avoided. During strip-out and special deconstruction they support sectional dismantling.
• Concrete demolition shears: used primarily on reinforced concrete members, for example at slab bearings or ring beams that tie into brick walls. In mixed constructions, concrete portions can be removed selectively before brick areas are split or taken down.
• Stone splitting cylinders: generate locally concentrated splitting forces, for example on piers or wall segments with high compressive strength.
• Combination shears and Multi Cutters: cut metal inserts (sections, service runs, fixings) within masonry areas – helpful during strip-out and cutting so that brickworks can then be dismantled without restraint stresses.
• Hydraulic power packs: supply connected tools with the required hydraulic output; decisive factors are suitable flow rate, pressure, and safe operation under site conditions.
• Steel shears and tank cutters: come into play when load-bearing steel parts, vessels, furnace internals, or pipelines around brickworks need to be dismantled, for example in industrial plant areas of historic brick factories or in special operations.
• Accessories: hoses, couplings, and safety valves sized for pressure and flow ensure reliable operation and quick tool changes.

Typical workflow for openings and partial deconstruction

1. Existing-conditions analysis: identify materials, bonds, joint pattern, structural function, hidden inserts.
2. Safeguarding: temporary shoring, dust and noise protection, segregate work areas, define escape routes.
3. Preliminary works: remove services, sections, and anchors using shears or Multi Cutters.
4. Selective separation: release concrete portions at interfaces with concrete demolition shears.
5. Controlled splitting: detach wall sections with stone and concrete splitters or stone splitting cylinders.
6. Finishing: clean joints, form cut edges, separate materials by type.
7. Verification and documentation: structural sign-off where required, record salvage quantities, and update as-built information.

Occupational safety, emissions, and environmental protection

Brick deconstruction produces dust, noise, and potentially vibrations. Appropriate measures include negative-pressure or extraction concepts, wetting, personal protective equipment, and a low-vibration approach. When dealing with old mortars, coatings, or inserts, check whether special caution is required. The applicable rules, technical data sheets, and regulatory requirements must be observed in planning and execution; a case-by-case review by qualified parties is advisable.

• Dust control: silica exposure management with extraction at source, wet methods, and suitable respiratory protection.
• Noise and vibration: method selection, time windows, and monitoring to protect adjacent uses and sensitive equipment.
• Interfaces and utilities: lockout-tagout of services, safe isolation, and verification before cutting or splitting.
• Manual handling: handling aids and clear drop zones reduce crush and pinch risks.

Recycling, reuse, and quality assurance

Selective deconstruction by type allows the reuse of whole facing bricks or the processing of brick rubble into secondary construction materials (e.g., brick chippings, recycled aggregates). Quality assurance includes checking for contaminants, particle-size distribution, and suitability for the intended purpose. When reusing in construction, the building-regulatory requirements must be observed; binding decisions should be based on current standards and test certificates.

• Reuse: sorted facing bricks can be cleaned, graded, and reinstalled in visible masonry with documented provenance.
• Recycling: crushed brick serves as lightweight aggregate in screeds, drainage layers, or as aggregate in bound materials, subject to conformity testing.
• Environmental aspects: avoid mixing with gypsum or bitumen; define acceptance criteria and testing frequency for recycled fractions.

Practical decision aids

Whether an opening in an old building, the strip-out of a masonry wing, or the selective deconstruction of industrial furnace systems – the combination of analysis, temporary safeguarding, and precise hydraulic tools leads to controlled results. In mixed constructions, concrete portions are removed with concrete demolition shears, while brick areas are separated with stone and concrete splitters. In tunnels with historic brick lining or in special operations in confined areas, a low-vibration, spark-free approach can reduce risks and emissions. This keeps load-bearing capacity, building physics, and material separation in balance – from strip-out and cutting through to concrete demolition and special deconstruction.

• Selection criteria: wall thickness, bond type, and presence of reinforcement or anchors.
• Context: proximity to sensitive uses, heritage value, and permissible emissions.
• Outcome: target geometry, salvage rate, and required surface quality for subsequent works.